I don’t know whether American banks can act as a custodian for Bitcoin or what licenses are needed to do so, but an increase in custodial custodians will increase the security of storing cryptocurrencies. Bitcoin ETF is not the last cryptocurrency ETF in the US.
This is the strangest thing I've ever heard!!! How will US banks be able to act as custodians of Bitcoin? There is a complete contradiction between the concept of Bitcoin and the concept of banks from the peak of decentralization to the peak of centralization!!! But this is always the case in Uncle Sam's country 
.In any case, it may be true that increasing the number of custodians would increase the security of storing cryptocurrencies, but it would expose the entire concept of decentralization and privacy to danger.
I expect that this is the most dangerous thing that ETF has brought to us, the transfer of Bitcoin to centralization. Instead of investors keeping their Bitcoin in their wallets, these central companies and banks will keep it and give them worthless shares.
