It's insane how much "blockchain" is used to scheme money from investors. There's no point in a centralised blockchain, that's just a database. Centralised databases can be pegged to THE blockchain by broadcasting a hash/hashes to it.

We're currently living through e-communism. Big centralised entities own everything and we simply have the right to rent our property and identity, the rent is payed in data. Bitcoin is e-capitalism!

Self-custody isn't self-custody on an online device! If the manufacturer, a hacker or the government can access the device remotely, your keys aren't solely in your custody.