The short version, before the cat: a password strength meter measures how a string looks, not how it was made. If your secret was derived from something short, no amount of symbols and capital letters makes it harder to guess — and in Bitcoin, that distinction is the whole game. Tuga has a toy mouse. When she's bored she bats it under the sofa, then spends ten minutes staring at the gap with her tail going, completely convinced the mouse has become a different and more interesting mouse by virtue of being somewhere else. It hasn't. It's the same mouse in a new position. The thing that changed is her view of it. I bring this up because I had a long exchange in the comments last week with someone who believes you can take a single character, run it through a generator, and end up with a secret that would take centuries to crack. He had evidence: he'd pasted the output into a password strength meter and it told him so. The meter was not lying. It was answering a different question than the one he thought he'd asked. That gap is worth an article, because it's where a specific and recoverable kind of money loss comes from. 1. What a strength meter actually measures You paste K7#mQ2$vLp9!xZ into a checker and it says centuries. What it has done is estimate: if this string had been produced by picking characters at random, how many guesses would an attacker need? Fourteen characters from a 95-character set is about 95¹⁴ possibilities. That is an enormous number, and the estimate is correct — conditional on the premise. The premise is the entire thing. The meter cannot see where the string came from. It sees the costume, not the person wearing it. 2. Why derivation can't create what wasn't there Here is the rule, and it's not a matter of opinion or implementation quality: A deterministic function cannot increase entropy. If you can reproduce the output from the input, then guessing the input gets you the output. An attacker who knows you used a generator doesn't attack the fourteen-character output. He attacks the input and runs the same generator. If your input was one character, he tries every character. If it was your name and a birthday, he tries names and birthdays. The output's appearance is irrelevant — he never guesses at the output space at all. Put plainly: the lock is only as strong as the smallest thing you'd have to remember to open it. This is why "it looks random" is not evidence of anything. Hash functions are designed to make low-entropy inputs produce high-entropy-looking outputs. That's their job. Mistaking that property for actual security is the oldest unforced error in applied cryptography. 3. This isn't hypothetical — it has a body count In Bitcoin's early years, "brainwallets" were popular: pick a memorable phrase, hash it, and that's your private key. No backup needed, nothing to store, just remember the sentence. Elegant. Attackers built dictionaries. Song lyrics, Bible verses, famous quotes, movie lines, every phrase in every book they could scrape, with every obvious variation. They precomputed the resulting addresses and watched the chain. When money arrived at one, it left within seconds — sometimes within the same block. People lost real money this way, at scale, for years. Not because the hashing was broken. The hashing worked perfectly. The input was guessable, and the output looked magnificent the whole time. Every "memorable input, strong output" scheme is a rediscovery of this, and the rediscovery always comes with a strength meter screenshot attached. 4. The Bitcoin-specific trap Here's what makes this worse for us than for your email password. Normal passwords are defended by the service. Guess wrong ten times at a bank login and you're locked out, rate-limited, flagged, emailed. The attacker gets a handful of tries. A weak password often survives because somebody else is guarding the door. A seed or passphrase has no door. Someone who obtains your backup tests candidates entirely offline — on their own hardware, in parallel, at millions of guesses per second, with nobody to notice and no limit. And unlike your email, there's a direct payout waiting if they succeed. So a scheme with, say, 350 million possible inputs is fine for a forum login and a complete donation for a wallet. Same scheme. Different threat model. The number of guesses an attacker can afford differs by a factor of roughly a trillion. 5. Where real entropy comes from It's boring, which is why people keep trying to invent alternatives. Dice. Physical dice, rolled by you, recorded by you. Most wallets document a dice-entropy procedure. It's tedious and it's unimpeachable. Your hardware wallet's generator. That's what the secure element is for. Generated on-device, never transmitted, shown once. Your wallet software's RNG, on a device you trust that isn't connected to anything it doesn't need to be. For a passphrase specifically: pick several words at random using dice or a generator, not from your head. Human-chosen "random" words are not random — we reach for the same ones, and attackers know which ones. Then write it down. The reason people invent derivation schemes is to avoid storing something, and storing something is not actually the hard part. It just feels less clever. 6. The uncomfortable half Having spent five sections on entropy, let me argue against my own emphasis. Entropy is almost never why people lose coins. Go through the actual losses of the last decade: phishing sites, fake support calls, malicious downloads, compromised clipboards, exchanges collapsing, seeds photographed "temporarily", and above all nobody knowing the wallet existed after someone died. Brute force is far down the list. If you've got twelve words from a hardware wallet in a sensible place, your entropy is fine and it has been fine since the day you set it up. So the real failure here isn't weak randomness — it's the mindset. The person who builds a clever derivation scheme is usually spending their security budget on the one threat they've already defeated, while the actual openings go unattended. I'd rather someone have a boring 12-word seed, a tested restore, and a letter for their family than a baroque system with a perfect entropy score and no documentation. And a strength meter still has one honest use. For a password you typed out of your own head, for a website, it will correctly tell you that Summer2024! is garbage. That's a real service. The error is only in pointing it at something derived and believing the answer. Finally, I'd rather you didn't take my word for it either. The reason the dice recommendation is safe isn't that I said so — it's that the procedure is published, auditable and attacked in public by people who'd love to find a flaw in it. A method whose details you can't inspect is asking you for trust, and in this field trust is the thing we're meant to be minimising. Tuga's mouse under the sofa is the same mouse. A secret that looks complicated and a secret that is hard to guess are two different things, and only one of them keeps your coins. 🐾⚡

Did you already visit me ? www.Tugathecat.com

The Kitten in the Cardboard Box There is a photograph on my site of a cardboard box in the grass, a saucer, and a tortoiseshell kitten roughly the size of a pear, pressed into the corner with the specific flattened posture of an animal that has decided the world is too large. That is Tuga, at about two weeks old, on the day everything in this blog started. She is now a full-sized cat who sleeps in car boots, owns every chair in this house, and has her name on a website, a YouTube channel, and sixty-odd articles about Bitcoin. None of that was the plan. The plan, that afternoon, was to get a very small animal through the night. 1. Two Weeks Old Is Smaller Than You Think People hear "I found a kitten" and picture something that walks around and eats. At two weeks, a kitten is a different proposition entirely: Eyes barely open, ears still folded, no real coordination. Cannot regulate its own body temperature. Cold kills far more orphan kittens than hunger does, and a cold kitten cannot digest food — warming it comes before feeding it, always. Cannot eliminate without help. The mother stimulates it. Without her, somebody does it with a warm damp cloth, several times a day. Needs feeding every few hours, around the clock, including the 3am one, for weeks. And the one that catches everybody: cow's milk is the wrong thing. It's the universal instinct and it causes diarrhoea, which in an animal that size is a serious problem fast. What they need is proper kitten milk replacer from a vet or pet shop — and until you have it, warmth and a vet's phone number beat improvising. I say all of this plainly because somebody reading this will find a kitten this year, and the first forty-eight hours decide most of it. 2. What Nobody Tells You The physical care is in every guide. Three things aren't: You will not sleep, and you will be weird about it. Two-hourly feeds at night for weeks is a newborn's schedule with none of the social support. You'll start checking whether she's breathing at 4am. This is normal and it passes. You will weigh her obsessively, and you should. A kitten that gains weight daily is a kitten that's winning. A kitten that stops gaining needs a vet today, not tomorrow. Kitchen scales are the single most useful tool in the house. Some of them don't make it, and it isn't your fault. Orphan kittens are fragile in ways that have nothing to do with the quality of your care. Anyone who has done this more than once has lost one, and nobody writes about that part. Tuga made it. A lot of the reason is that she was found in time, and a lot of it is luck, and the honest ratio between those two is not flattering to me. 3. What She Turned Into The flattened kitten in the box became a cat with opinions about absolutely everything. She supervises. She has a specific chair, and the specific chair is always the one somebody just left. She goes out at 4am through a flap she regards as her sovereign territory, and comes back in at dusk via the kitchen window instead, for no reason anyone has established. She once spent two days watching a washing machine because a mouse went behind it. She is also, and this is the part I did not see coming, the reason I understand money better than I did. Every analogy I've used across this blog came from watching her: the cat flap that explained Lightning, the high shelf that explained volatility, the burying that explained privacy, the sixteen hours of sleep that explained doing nothing on purpose. I didn't set out to write about Bitcoin through a cat. I set out to keep a kitten alive and then noticed she'd been explaining things to me for years. 4. Where to Actually Meet Her All of this lives at tugathecat.com. There's a diary — dated entries with photos, from the box in the grass through to this month. If you only want the cat and none of the Bitcoin, that part stands completely on its own, and it's the part I'd send to someone who doesn't care about any of this. There's the colony — Os Amigos da Tuga, the six to eight street cats who turn up at dusk every day and are the reason the donation page exists. And there's the Bitcoin half, in plain language, for anyone who arrived for the cat and got curious. Three languages: Portuguese, English, Polish. No newsletter popup, no token, nothing to sign up for. The Point A box, a saucer, and an animal that fitted in two hands. If that afternoon had gone differently there would be no channel, no site, no articles, and I'd probably still think a bank balance and money were the same thing. She's asleep on the chair I was using. Go and meet her. 🐾 tugathecat.com — the diary starts with that box. ⚡ Not veterinary advice — if you find an orphan kitten, call a vet. Warmth first, then food, then the phone. This article contains no affiliate links; the site has some, disclosed there. Tags: Cats, Kittens, Rescue, Bitcoin, TugaTheCat

Ask me how many street cats I feed and I'll give you a careful answer, because the honest number depends entirely on what you mean. Cats I have seen in this area: maybe fifteen. Cats that have eaten here at least once: nine. Cats that come most days: five. Cats that would notice if I stopped: four, and one of those would only be mildly inconvenienced. Every one of those numbers is true. Only the last two describe anything real. And if I wanted the colony to sound impressive, I would obviously quote the first. Crypto reports its adoption the same way, and learning to read which number you're being handed is most of the skill. 1. The Vanity Tier These get quoted constantly and mean almost nothing on their own: Total addresses. Addresses are free and one person generates hundreds. A rising count can mean adoption, or one exchange restructuring its wallets, or a single service creating addresses on a schedule. "Users" during an incentive. Any number produced while rewards are flowing measures the rewards, not the interest. The honest version of this metric is what remains three months after the incentive ends. Social followers and mentions. Attention. Sometimes a leading indicator of adoption, sometimes a leading indicator of a campaign, and unfalsifiable either way. Partnership announcements. A press release is a statement of intent by two marketing departments. Ask again in a year whether anything shipped. App downloads. Installing is not using. The interesting number is how many are still open thirty days later, and nobody publishes it voluntarily. The pattern: all of these measure arrival, and adoption is about staying. 2. What's Actually Worth Watching The better metrics share a property — they are expensive or inconvenient to fake, because someone had to do something costly. Coins in long-term storage. Supply that hasn't moved in years, and the trend in it. Holding through a full cycle without selling is a behaviour nobody performs by accident. Coins leaving exchanges into self-custody. People pay a fee to take possession. Small, deliberate, and revealing. Lightning capacity and channel counts. Capital locked into a payments network by people who intend to use it. Imperfect — public capacity is only part of the picture, and some of it is idle — but it's real money committed to a purpose. Fee revenue paid to miners. People voluntarily paying for block space is the most direct measure of demand there is. Nobody pays a fee for a transaction they didn't want. Non-speculative use in places with broken currencies. Remittances, savings in unstable-currency economies, cross-border payment where the alternative is worse. Hard to measure, and the strongest signal in the set — because it's use driven by necessity rather than by upside. Institutional custody structures. Slow, boring, and hard to reverse. Once an asset is in retirement accounts and treasury policies, it has a constituency. 3. The Honest Problems Every one of those has a caveat, and anyone quoting them without one is doing marketing: On-chain data is inferred. "Long-term holder" cohorts and exchange balances are built from clustering heuristics and labelled wallets. Good work, real limitations, revised over time. Lightning is partly invisible by design. Private channels don't publish. Capacity understates and overstates in different directions depending on what you're asking. Custody concentrates the count. Millions of people holding via one institution look like one entity on-chain. Adoption can rise while visible addresses do not. Fees are demand and congestion. High fees can mean enthusiasm or a temporary spam pattern. Direction over months, not spikes over days. The intellectually honest position: these are indicators with error bars, useful in trend and unreliable in precision. Anyone reading them to three significant figures is over-fitting. 4. Why It Matters for What You Hold This isn't academic. The entire long-term case for bitcoin as a monetary asset rests on adoption continuing — and if you can't distinguish real adoption from noise, you can't tell whether your thesis is progressing or stalling. You should be able to name, specifically, what you'd expect to see over the next few years if you're right, and what you'd see if you're wrong. If the answer to both is "the price", you don't have a thesis. You have a position. My own version, offered as an example rather than a prescription: I'd expect long-dormant supply to keep growing across cycles, fee revenue to trend up over the long run as the subsidy shrinks, and real payment use to expand in places where the local currency is failing. If those flatten for a decade while price rises anyway, something is happening that isn't the thing I said was happening. The Point Four cats would notice if I stopped. That's the number that describes the colony, and it's a much less impressive number than fifteen, which is why nobody would ever choose to quote it. Adoption is the same. The counts that flatter are the counts of everyone who ever passed through. The counts that matter are of people who would notice if it went away — and those are always smaller, always slower, and always the only ones worth building a thesis on. Count the ones who'd notice if it stopped. 🐾⚡ Nothing here is financial advice — I feed cats and write about Bitcoin, which qualifies me to advise you on neither. On-chain metrics are estimates with real limitations. Do your own research. Tags: Bitcoin, Cryptocurrency, On Chain Analysis, Adoption, Crypto Market

Winter is coming to central Poland, and the cats in my garden sleep outside. I've fed a colony here for years. They won't let me touch them — they know me, they know what time I show up, and they bolt if I get close. This week I wrote down everything I've learned about getting them through the cold. A few things that surprised me: → They learn the hour long before they learn to trust. By 7am they're already waiting in the same spot. Nobody taught them that. → Three meals, and the one after sunset matters most. The night is what kills. → Some only eat off the ground, others only from a bowl. They don't swap. Put a ground-eater's food in a bowl and he walks away. → Water is more work than food. It freezes, and no trick beats walking out there and changing it. → Hay rots and goes mouldy. Straw is hollow, stays dry, and they burrow into it. → Blankets look cosy and turn into a frozen rag by morning. There's also the shelter I put together: flat-packed wood, polystyrene in the walls, two compartments, up on concrete blocks so the damp can't climb in. Photos of the whole build are in the guide. Free, no signup, no newsletter. English, Portuguese and Polish.

TugaTheCat

Street cats in winter — TugaTheCat

The routine I use to get a colony of street cats through winter: what time I feed them, how I keep the water from freezing, and how I built the she...

If it helps one cat somewhere cold, it was worth writing. ⚡ #catstr

Nine Lives, Zero Leaks: Come and Meet the Cats Behind All This Sixty-odd articles in, I've used Tuga to explain cat flaps and Lightning channels, dust attacks and doorstep offerings, the warm spot on the wardrobe and why volatility is the price of the high shelf. What I've never done here is show you the actual cat. So: tugathecat.com is live, and this is the invitation. It's the home for everything these articles keep circling — the real animals, the real vet bills, and the Bitcoin argument told through them rather than at you. The Cats Are Real This is the part that matters most, and it's the first thing the site establishes. Tuga is a tricolor who was rescued at about two weeks old and now runs this household with the confidence of someone holding the deeds. She is not a brand mascot, a stock photo, or an AI-generated creature with a wallet address. She is a cat who sleeps in the car boot for reasons she has never explained. And there is Os Amigos da Tuga — the Friends of Tuga — the outdoor colony of six to eight regulars who turn up at dusk every day and have done for years. They're the reason the donation section exists at all. Food twice a day, every day, plus the vet bill that arrives without warning when one of them shows up limping. The site has a diary: dated entries with photos, from real days, updated as things happen. If the Bitcoin half doesn't interest you, that part stands on its own as a cat you can follow. The Bitcoin Half The site's hero line is "Nine lives. Zero leaks.", and the whole argument sits underneath it in four pieces — the same ones I've been unpacking at length here: Bitcoin as a battery for human energy: your time and work, stored in something that doesn't leak. Fiat as the sack of food with a hole in it. Sovereignty, framed the way a cat already understands it: the difference between a hotel room and your own territory. A bank balance versus keys you hold. Lightning as the cat flap — the thing that lets value move without asking anyone to open a door. Backing up the seed, because every other idea on the list is decoration if the twelve words are on a photo in your phone. If you've read these articles, you'll recognise the arguments. The site is the short version, in plain language, for the friend you've been failing to explain this to. Send a Zap, If You Want To The donations are in sats over Lightning, and they're denominated in things rather than numbers, because that's what the money actually becomes: 1,000 sats — one meal for the colony. 5,000 sats — a full day of food. 21,000 sats — a week of litter. There's a Lightning Address with a copy button and a QR code, and for anyone without a Lightning wallet, a Ko-fi page that takes a card. I'd rather you used Lightning, obviously. Not for me — because sending a few hundred sats to a stranger's cats, instantly, for a fee that rounds to nothing, is the single best demonstration of what this technology is for. It takes thirty seconds and it teaches more than any article I could write about it. What Else Is There Gear that actually gets used — the food, the beds, the toy, the outdoor camera I watch the colony with at dusk. Those are Amazon affiliate links, disclosed on the page: I earn a small commission at no extra cost to you. If you'd rather buy elsewhere, buy elsewhere. Three languages — Portuguese by default, with English and Polish. I'm Portuguese, living in a Polish village, writing for an international crypto audience, and the site reflects exactly that mess. No tracking theatre, no newsletter popup, no token. It's a static site that loads fast and asks you for nothing. The Honest Bit I'm not neutral. I hold bitcoin, I take donations in it, and the site carries affiliate links — the full disclosure is at the bottom of every page and in my article about reading crypto content without being farmed. Read me with that in mind, as you should read everyone. And the cats are fine. The donations make the colony easier to sustain and take the sting out of the vet, but nobody is going hungry if you don't click anything. Visit because you like cats, or because you want the Bitcoin argument in a form you can send to your brother-in-law. Both are good reasons. Neither requires your money. The Point Everything I write here starts in a garden in a Polish village, with a tricolor cat who has strong opinions about chairs and a colony that arrives at seven whatever the weather. Now you can go and see them. 🐾 tugathecat.com — nine lives, zero leaks. ⚡

Tuga had a cat flap before this one. It worked, it was perfectly adequate, and it was eventually replaced — not because it broke, but because the hinge had been designed in a decade when nobody expected a cat to use it four thousand times a year. It still opened. It just wasn't getting any better. Ledger's Nano S has reached that point. After nearly a decade as the device that introduced most people to self-custody, it has been retired: software support has ended, and the hardware's memory limits meant it was never going to keep up with what people now expect to run on it. If you own one, this is not an emergency. It is, however, something to handle on purpose rather than by accident. 1. First: Your Coins Are Not in Danger Say it clearly, because retirement announcements generate exactly the kind of urgency scammers harvest. Your Nano S still works, and your coins are not on it. They live on the blockchain. The device holds a key, and your recovery phrase is the real asset. An unsupported device doesn't lose funds — it stops getting updates and stops supporting new applications. What you should not do: panic, rush, or respond to any message claiming Ledger needs you to "migrate" your wallet by entering your recovery phrase somewhere. There is no such process. Every end-of-support announcement in this industry is followed by a wave of phishing built on it. 2. What Replaces It: the Nano Gen5 Ledger's revamp of the classic line is the Nano Gen5, and it's a genuine generational jump rather than a refresh. The headline change is the touchscreen. The Nano S was two tiny buttons and a one-line display — the thing that made verifying a long address on-device a small act of endurance. The Gen5 puts a proper screen in the same pocketable form factor, and since "read what's actually on the device screen before confirming" is the single most important habit in self-custody, making that screen usable is a security improvement dressed up as a convenience one. Beyond that: far more memory than the Nano S could offer, so you aren't uninstalling one app to make room for another, and it doubles as a security key with passkey support — meaning the same device can handle the hardware-key login I recommended in the article about securing everything around your bitcoin. One object, two jobs, both of them things you should already be doing. It currently sells for around 769 zł / ~$179, in four colours. The honest framing: the touchscreen and the extra memory make it nicer and easier to use correctly. They don't make the underlying security model fundamentally different — it's the same secure-element approach, and your recovery phrase is still the thing that matters. And Ledger isn't the only serious option: Trezor, BitBox and Coldcard are all real devices, and Coldcard in particular is built for the air-gapped and multisig workflows I wrote about recently. I'm writing about this one because it's the natural path for the very large number of people holding a Nano S that just reached the end of its life. 3. The Migration, Step by Step Not complicated, and the order matters: Set up the new device first. Let it generate its own fresh recovery phrase. Write it on paper now, metal later, and treat it as a completely new secret — because it is. Do the restore drill before moving anything. Wipe the new device, restore it from the new phrase, confirm it comes back. Twenty minutes. Send a small test amount from the old wallet to the new one and confirm it arrives. Move everything else, in as few transactions as fee rates allow, during a quiet period. Then wipe the old Nano S. Keep it as a souvenir or retire it — but don't leave a funded wallet on a device you've stopped maintaining. Don't simply restore the old phrase onto the new device. You can — the standard is shared — but a migration is the perfect moment to retire a seed that has been through a decade of your life, several computers, and whatever your younger self did with a photo of it. New device, new secret, clean slate. 4. Buying It Without Repeating This Month's Disaster This matters more than which model you pick, and it is extremely current. In October 2026, Ledger users reportedly lost tens of millions after devices that passed through one reseller were allegedly tampered with before sale. No cryptography was broken. The seed was simply known to someone else before the buyer ever opened the box. So, the rules for buying any hardware wallet, in order of importance: Buy from the manufacturer or an official channel. Ledger's own site is the gold standard. On a marketplace, buy only from the manufacturer's official storefront — check the "sold by" line and make sure it says Ledger, not a third-party seller with good reviews and a better price. Never used. Never a bargain. Never a gift from someone you wouldn't hand your bank card to. The device must arrive with no wallet on it. It generates the phrase, on its own screen, in front of you, and you write it down. If a recovery sheet arrives already filled in, you are holding a theft in progress. Run the genuine check and update the firmware from the official app before funding — while understanding that this proves the hardware is authentic, not that your seed is unknown to someone else. Provenance protects you. Attestation alone does not. Buy the steel backup at the same time. Paper survives everything until the one day it doesn't, and the plate costs a fraction of the device. 👉 You can get the Nano Gen5 here: https://link.amazon/B03l7WkXz — sold by Ledger, which is exactly the "official storefront" condition above. As with everything on this site, that's an affiliate link: it costs you nothing extra and it helps feed the street cats. Buy wherever you like — just follow the rules above wherever that is. 5. While You're In There A device migration is the natural moment to fix the things everyone postpones: Move the backup from paper to metal, in two separate locations. Write the letter — what exists, where the backups are, which app opens the device, who to call. Switch to native SegWit addresses if you're still on legacy, and stop paying the old-format tax on every transaction. Set the new device up as your security key for your email and exchange logins while it's in your hand. Do the restore drill, and put a yearly reminder in the calendar to repeat it. None of that is about the new hardware. All of it is easier on the day you're already elbow-deep in your own setup. The Point The old flap still opened. Replacing it wasn't a rescue — it was maintenance, done at a moment of my choosing rather than in February, with a broken hinge and a cat on the wrong side of the door. Your Nano S is fine today. Retire it deliberately, generate a fresh secret while you're at it, and buy the replacement somewhere whose chain of custody you can actually describe. It isn't an emergency. That's exactly why it's a good time to do it properly. 🐾⚡

⚠️ On the $86M Ledger drains: Ledger says it's linked to a reseller, not a device-wide exploit. Still unconfirmed. Either way, the rule holds: buy direct from the manufacturer. Never a reseller. Never used. A pre-filled recovery sheet is the theft. 🐾⚡ Tugathecat.com

In September I wrote that Kitty was eating four pouches at a sitting, and guessed she was stocking up for the Polish winter. I was wrong. She was already nursing. Three kittens, about a month old. They only come out of the bushes once I've walked away — same as their mother, who has never once let me near her. I put the food down and step back. That's the whole arrangement, and it's been that way for three years. I feed a colony in my garden in rural Poland. I've never touched a single one of them. I keep a photo diary anyway, going back to the cats who were here before I arrived: tugathecat.com/en/diario/ Zaps go into food. ⚡🐾

🐾 Tuga's diary and the garden colony:

TugaTheCat

TugaTheCat — Cats, Bitcoin and energy that doesn

Tuga and Tuga

Found a kitten? What to do in the first 24 hours:

TugaTheCat

I found a kitten: what to do in the first 24 hours — TugaTheCat

A practical guide for anyone who has found a newborn kitten: warm before feeding, which milk to use, how to stimulate them to urinate, and when to ...

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Knowing When to Come Inside: The Plan Nobody Writes Tuga comes in at dusk. Not because she is told to, and not because anything has gone wrong — she simply has a rule about the light, and the rule exists before the evening does. Cats without that rule are the ones out at 2am in the rain, making a decision they are in no state to make. Almost everything written about bitcoin is about getting in. Buy this way, hold through that, secure it like this. I have written a great deal of it myself. Nearly nothing is written about coming inside, which is strange, because every single person who has ever profited from this asset did so by eventually selling or spending some of it. Wealth that is never converted into anything is a number you were briefly responsible for. 1. Why Nobody Plans the Exit Three reasons, and they're worth naming because they're all a bit embarrassing. It sounds like disloyalty. In a community built on conviction, discussing selling feels like admitting doubt. So people who have thought carefully about it mostly stay quiet, and beginners conclude nobody does it. It's harder than buying. The buy decision has one variable — when. The sell decision has price, amount, tax, timing, what the money is for, and a strong emotional pull in both directions. Optimism costs nothing until it does. Not planning feels free right up to the moment a decision is required at speed, and then it is the most expensive gap in the whole plan. 2. Selling Is Not One Thing Most of the confusion dissolves once you separate the reasons, because they have completely different logic: Spending it. Using bitcoin as money — the flat, the trip, the thing you were saving for. This was always the point. It requires no market view whatsoever. Rebalancing. The position grew until it's a larger share of your wealth than you intended. Trimming back to target is risk management, not a prediction. Life happening. A house, a medical cost, a business, a year off. The asset did its job: it stored value until you needed it. Thesis broken. Something you said would need to be true turned out false. This is the only one that's actually about bitcoin, and the only one that requires you to have written down what would change your mind. Notice that three of those four have nothing to do with the price. That's the most useful thing in this article. 3. Write the Rules While It's Daylight The whole trick is deciding before you're in a state where deciding is hard — which means both euphoria and panic, not just panic. A workable structure: A purpose, named. "This position exists to fund X." A deposit, an education, a freedom number, a retirement. A position with no purpose can never be complete, which means it can never be right to sell any of it, which is how people ride full cycles up and back down. A ladder, not a moment. Nobody calls the top. So decide in advance to sell portions at intervals — by price levels, or by portfolio percentage, or simply by calendar. Selling a fifth of a position at five different prices guarantees you won't get the best outcome and guarantees you won't get the worst one either. A floor you never touch. Decide the amount that isn't for sale at any price, and hold it separately, in different custody, so that "selling" is never a question about the whole stack. Check the tax rules where you live, before you sell, not after. Treatment varies enormously by country and can change the optimal size and timing of a sale considerably. One conversation with someone qualified, once, is cheap. 4. The Trap on Both Sides Two failure modes, and they're mirror images. Never selling anything, ever. The position becomes an identity rather than a tool. Cycles pass. The money never becomes a life. There are people who were rich on paper three separate times and still live exactly as they did, which is a fine outcome if it was chosen and a sad one if it wasn't. Selling the floor in a panic. The drawdown arrives, the reasonable case for giving up arrives with it, and the part that was never meant to be sold goes with everything else. This is why the floor needs to be physically separate — a different wallet, ideally a more inconvenient one. Friction is a feature at 3am. The plan protects you from both. That's its actual job: not maximising the outcome, but removing the two ways you'd wreck it. 5. The Version I'd Suggest to a Beginner Not advice, just the simplest thing that works: Decide what share of the position is never for sale, and move it to the most inconvenient custody you have. Decide what the rest is for — a specific thing, written down. Set a rule for converting it: price levels, a percentage per year, or on reaching the purpose. Any rule beats none. Re-read it once a quarter, and change it only from the written plan, never from the chart. That's the whole discipline. It takes twenty minutes and it's the difference between an asset and a habit. The Point Tuga's rule about the light isn't caution and it isn't a forecast about the weather. It's a decision made in advance, in daylight, by a version of her that wasn't cold, wet, or being chased by the neighbour's dog. You are going to come inside eventually. Everyone does — by choice, by need, or by panic. The only question is whether you decided the terms while the sun was still up. Decide when you're coming in before it gets dark. 🐾⚡ Nothing here is financial or tax advice — I feed a cat and write about Bitcoin, which qualifies me for neither. Tax treatment of disposals varies enormously by country; check yours before acting. Do your own research. Tags: Bitcoin, Investing, Crypto Market, Risk Management, Cryptocurrency

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Earning It Instead of Buying It: Getting Bitcoin Without an Exchange Tuga has never bought anything. Everything she possesses arrived through one of three routes: it was given to her, she performed a service she considers valuable (existing, decoratively, near me), or she took it. The economy of a cat is entirely non-monetary and she is doing fine. Most people's mental model of acquiring bitcoin has exactly one route in it: open an exchange account, connect a bank, buy. That works, and I've written about doing it well. But it is one door among several, and the others have properties the exchange route doesn't. 1. Get Paid in It The most direct route, and the most underused: invoice in bitcoin for work you already do. If you freelance, consult, teach, design, translate, or write, adding bitcoin as a payment option costs you nothing and occasionally finds a client who prefers it — often an international one for whom a bank transfer is slow and expensive. You send a Lightning invoice or an on-chain address; they pay; you're done. No account opening, no waiting period, no withdrawal limits. Two practical notes. Price the work in your own currency and convert at the moment of invoicing, so you're not accidentally taking a price bet on a job you already did. And decide in advance what share you keep versus convert, because "I'll decide later" tends to mean deciding with the chart open. 2. Earn It in Small Amounts There is a whole tier below invoicing, and it's how most people actually get their first sats. Tips and content platforms. Publishing on platforms where readers tip in crypto — this one included — pays in small amounts that accumulate. The sums are modest. The education is not: your first sats arriving from a stranger who read something you wrote teaches you more about what this is for than any article. Bounties and small contracts. Bug bounties, translation work, small development tasks — corners of the bitcoin economy routinely pay in bitcoin. Selling something. A second-hand item, a digital product, a print. Accepting bitcoin for one real transaction converts the whole thing from theory to plumbing. The amounts are small and that's fine. The purpose isn't accumulation — it's that earning bitcoin builds a completely different intuition from buying it. You stop thinking in entry prices and start thinking in units received for work done. 3. Peer to Peer You can also buy directly from another person, through platforms that hold funds in escrow while both sides complete their side of the trade. The honest assessment: it's more work, sometimes at a worse price, and it carries counterparty risk that an exchange absorbs for you. The escrow protects you from the obvious theft; it does not protect you from a confusing dispute, a slow counterparty, or a payment method that can be reversed after you've released the coins. Use established platforms with real reputation systems, start with small trades, never release escrow before funds are genuinely settled on your side, and never let anyone move you to a private chat. It's a legitimate route used by many people. It is not the beginner-friendly one. 4. Mine It Covered in more depth elsewhere, but for completeness: mining is an acquisition route, and for home users a poor one economically unless you're reusing the heat or treating a solo pool as a lottery ticket. Worth knowing it exists. Not worth building a plan on. 5. What This Does and Doesn't Get You Let me be precise, because this topic attracts wishful thinking. What it does: Removes the exchange as a dependency and a delay. Avoids repeatedly linking your identity to purchases at one company — though your counterparties, your invoices and your bank records still exist. Builds units through work rather than through timing, which sidesteps the entire "waiting for a better price" problem. Teaches you the payment side of bitcoin, which buyers never learn. What it doesn't: It does not remove your tax obligations. Bitcoin received as payment for work is, in most places, income at the value on the day you received it — exactly as if you'd been paid in anything else. Rules vary; check yours. Anyone framing this route as a way around that is giving you advice that ends badly. It doesn't make you anonymous. The person who paid you knows who you are. It doesn't remove price risk. You're now holding a volatile asset you earned instead of a volatile asset you bought. The Point The cat economy is not better than ours. It's just a reminder that "acquire" and "purchase" are different words, and that we've collapsed them so thoroughly that most people never consider the other doors. You don't have to buy your way in. You can be paid your way in, for work you were doing anyway, by people who'd rather pay this way — and the sats you earn that way tend to be the ones you understand best. Don't just buy it. Get paid in it. 🐾⚡ Not financial or tax advice — I feed a cat and write about Bitcoin, which qualifies me for neither profession. Income received in bitcoin is taxable in most jurisdictions; check the rules where you actually live. Tags: Bitcoin, Lightning Network, Cryptocurrency, Freelancing, Self Custody

There is a large dog three doors down. He is four times Tuga's weight, considerably louder, and entirely convinced of his own authority. He also does not decide anything about this house. He can make noise at the gate for as long as he likes; the rules of the property are set by whoever is inside it and whoever it belongs to. Miners are the dog. They are enormous, expensive, industrial and loud, and a great many people believe they run Bitcoin. They don't. Understanding why is the single most important political fact about this system, and it is the reason a Raspberry Pi in a cupboard matters more than it has any right to. 1. Two Different Jobs The confusion comes from collapsing two roles into one word. Miners order transactions. They compete to assemble the next block, choose which pending transactions to include, and burn energy to earn the right. That's it. That's the job. Nodes enforce the rules. Every full node independently checks every block against the consensus rules: is the subsidy correct, are the signatures valid, is anything being spent twice, does this transaction obey the script rules. A block that breaks any rule is rejected — not reported, not flagged, rejected, as though it never existed. A miner who produces an invalid block has burned real electricity to produce something the network treats as garbage. They cannot force it on anyone. Their hash power buys them the right to propose, never the right to decide. 2. What "Running a Node" Actually Means This is why the Pi in the cupboard is not a hobby project. When you run a full node, you stop asking anyone what the rules are. You verify the entire chain yourself, from the genesis block forward, and your node will reject a block that violates the rules even if every miner on earth accepted it. Your copy of the truth is not a copy — it's an independent computation of it. Multiply that by tens of thousands of machines belonging to people with no relationship to each other, and you get the actual answer to "who is in charge": nobody, in a very specific and expensive way. Changing the rules requires convincing those people to voluntarily run different software. That is a genuinely hard thing to do, and it is supposed to be. 3. The Time It Was Tested This isn't theory. It was tested publicly, in 2017, in a conflict people still argue about. A large coalition — major mining operations and several of the biggest companies in the industry — backed a plan to increase the block size via a hard fork, alongside the SegWit upgrade. By every conventional measure of power, they had it: hash rate, capital, exchanges, headlines. What they didn't have was the nodes. A grassroots movement of users pushed for activation of SegWit as a soft fork that node operators could enforce themselves, regardless of miner preference. Bitcoin Cash split off in August 2017 for those who wanted the larger blocks. The remaining hard-fork plan was abandoned that November. The industry lost to the people running software on cheap hardware in their homes. Whatever you think of the specifics, that outcome is the clearest demonstration anyone has of where authority in this system actually sits. 4. Soft, Hard, and Why the Distinction Matters A soft fork tightens the rules. Blocks valid under the new rules remain valid under the old ones, so nodes that don't upgrade continue to follow the chain. Backwards-compatible, opt-in, low-drama. A hard fork loosens them. Blocks valid under the new rules are invalid to old nodes. Anyone who doesn't upgrade is left on a different chain. This requires essentially unanimous adoption, or you get two networks. This asymmetry is why Bitcoin changes slowly and by tightening. Loosening the rules requires everyone's cooperation, which nobody can compel — so the supply cap, and everything else load-bearing, is defended by the sheer difficulty of coordinating a hard fork against people who benefit from refusing. The famous slowness is not stagnation. It's the mechanism working. 5. What This Means For You Practically, three things: A node is the only way to actually verify. Without one, you're trusting someone else's report of what the rules are and whether they were followed. With one, you're checking. That's the entire difference between believing and knowing. It's cheap and passive. A modest machine, a 1-2TB SSD, an initial sync that takes a day or two, and then a background process. That's the price of participating in the only vote that counts. Your wallet should talk to it. Otherwise you're verifying the chain and then asking a stranger's server what your balance is — which leaks exactly the information you set out to protect. The Point The dog can bark for hours. He does, most evenings. The house's rules are unaffected by his volume, his size, or his conviction that the arrangement should be otherwise, because none of those things are what determines who lives here. Bitcoin's rules are enforced by the least impressive machines in the system — cheap boxes in spare rooms, run by people with no coordination and no shared interest beyond wanting the rules to hold. That's not a weakness in the design. It's the entire design. Miners propose. Nodes decide. Be a node. 🐾⚡

Nine Lives, One Seed Phrase: Tuga's Inheritance Plan Cats are famously bad at contingency planning. Tuga sleeps in the middle of the garden path with her belly exposed, having made no arrangements whatsoever for the possibility of rain, dogs, or the postman. She gets away with it because the myth grants her nine lives. Your seed phrase gets one. This is the least glamorous article I will ever write, and it is probably the most important. Everybody who takes self-custody seriously eventually arrives at an uncomfortable question, and most people arrive at it and then quietly walk away: what happens to your bitcoin if something happens to you? 1. The Failure Mode Is Not What You Think Ask someone what they are protecting their coins from and they will say hackers. Fair. But look at how self-custodied bitcoin has actually been lost, and hacking is not top of the list: A hard drive in a landfill. A seed phrase written on paper in a house that later had a fire, a flood, or a very enthusiastic house move. A person who died with everything in their head and nothing in anyone else's. A "clever" hiding place that outlived the memory of where it was. None of those involve an attacker. They involve entropy, and entropy is undefeated. Self-custody transfers the risk from someone stealing it to you losing it, and the second risk is the one people leave unmanaged. 2. Paper Burns. Metal Doesn't. Your recovery phrase is the whole thing. Not the device — the phrase. Lose the hardware wallet and you buy another one and restore. Lose the phrase and there is no support line, no reset link, no appeal. The rules that actually matter: Never digital. No photos, no notes app, no cloud drive, no password manager, no email to yourself, no "encrypted" text file. The moment it touches an internet-connected device it is a different threat model entirely. Metal, not paper. Steel backup plates cost about the same as a mediocre dinner and survive fire and water. Paper is a plan that works right up until the day it needs to. Two locations, minimum. One copy at home and one somewhere geographically separate. A single hiding place is a single point of failure, however clever it feels. Never split a phrase into halves. People love this idea. It reduces your security (twelve known words makes brute-forcing dramatically easier) and increases your loss risk (now two things must survive instead of one). If you want splitting done properly, that is what multisig is for. 3. The Passphrase Trap The optional extra word — the "25th word", the passphrase — is a real security upgrade. It also silently destroys more inheritances than any other feature in bitcoin. Here is how it goes. You add a passphrase. You back up the twelve words in steel, carefully, in two locations. The passphrase lives only in your head, because that was the point. You die. Your family finds the steel plates, follows the instructions, restores the wallet — and finds an empty account, because without the passphrase the correct seed opens the wrong wallet. They will not know why. It will look exactly like the money was never there. If you use a passphrase, it must be backed up too, separately from the seed, with instructions that say it exists. A secret nobody knows exists is not a secret. It is a deletion with extra steps. 4. Write the Letter, Not the Seed The document your family needs is not your seed phrase. It is the map. Written for someone who has never heard the word "blockchain" and is reading it on the worst week of their life. It should say, in plain language: That it exists at all. How much, roughly, and that it is real money. People have thrown away hardware wallets because they looked like a USB stick. Where the backups are. Both of them. Physically. "Safe deposit box at X, key held by Y." What the device is and what app opens it. Brand and model. "This is a Ledger. You need Ledger Live, from ledger.com — and only from ledger.com." Who to trust for help. Name a specific person you trust technically, and warn explicitly that anyone who contacts them offering to help recover it is a thief. Grieving families are targeted. The one rule. Nobody, ever, types those words into a website or sends them to a person. Not to "verify", not to "unlock", not to anyone claiming to be support. Keep the letter with your will, not with the seed. And update it when things change, because a map to a house you moved out of is worse than no map at all. 5. Do the Fire Drill This is the step everyone skips, and it is the only one that proves any of the rest works. Buy a second hardware wallet, or factory-reset the one you have — after confirming your backup, obviously. Restore from your steel plates alone. No memory, no phone, no photo. Just the metal. If your coins appear, your plan is real. If they don't, you have just discovered that at a moment of your choosing, with your money still safe, instead of your widow discovering it in three years. Do it once a year. It takes twenty minutes and it converts a hope into a fact. The Point Tuga will sleep through every scenario in this article. She has the luxury of that because someone else in this household does the contingency planning, and I have made my peace with the arrangement. Nobody is doing it for your bitcoin. Not a bank, not an exchange, not a lawyer who doesn't know what a passphrase is. Self-custody means you took the keys and the responsibility in the same motion, and the responsibility half is the boring paperwork nobody posts about. A cat gets nine lives. Your seed phrase gets one. Back it up like you believe that. 🐾⚡ Not financial or legal advice — I write about cats and hold my own keys, which qualifies me for neither profession. Estate rules differ by country; talk to someone qualified where you actually live. Tags: Bitcoin, Self Custody, Crypto Wallets, Security, Cryptocurrency