Even though this sound like a good thing but i believe we are other stretching the importance of Bank over crypto. Even though there is no bank own by Bitcoiner but this has not stopped Bitcoin transaction and Fiat withdrawal except in countries where there has been a total ban, even in a country like Nigeria where the government recently announce that Banks should no longer support Crypto trading. people still find their way around trading and withdrawal via P2P. So putting too much emphases on owning a bank to me wont really mean much and besides if there is a global adoption, i think that would be better than the bank cos i believe we can still do bitcoin trade that is paying directly with bitcoin or any other crypto as accepted by the institution or Business.
I am pretty sure the logic is that if we could have an international bank that could be even a digital one, that gets the right to be in any nation, or at least approved nations, you will not be forced to have a location aside from HQ in that country, (meaning there is no need for bank stores physically) and if you could work with other banks for ATM or put in your own BTM type of deals around the nation, you could literally have a global crypto community tied together without ever needing another bank.
This would be sort of like an exchange, which also will include fiat as well but would be mainly like an exchange, think of it like binance that has BTM all over the world, you can withdraw crypto or fiat from their BTM and everything else is literally the same as Binance for you, that would be amazing. So, do not think traditional banks, just think exchanges that got rights to work like a bank.