2010-13...Bitcoin Savings & Trust...don't worry, we have the BTC (was a ponzi) 2013-14...Mt Gox, Cryptopia...don't worry, we are bigger bitcoin companies than ever before, more regulated, and have the BTC (ran a fractional reserve exchange; got hacked) 2015-21...Bitfinex, Quadriga CX......don't worry, we are bigger bitcoin companies than ever before, more regulated, and have the BTC (got hacked for 120k BTC, paid for via bail-in from customers, which was a 36% haircut on balance; one man held all the keys and died under bizarre circumstances) 2022...FTX, Blockfi, Celsius...don't worry, we are bigger bitcoin crypto companies than ever before, more regulated, and have the BTC/shitcoins (bought sponsorships and Bermuda real estate with customer fiat rather than BTC/shitcoins; ran fractional reserves) 2023-2026...???, ???, ???...don't worry, we are bigger companies than ever before, more regulated, cozy with politicians, and have the BTC. Also, proof of reserves are bad because then people can attack us for the bitcoin that we say we own.