A real crypto bank is missing or it doesn't really matter as our wallets is the one that serves our bank accounts.
My idea is that a bank or an establishment that totally focuses with banking service but the currency will be in cryptocurrencies, mainly with bitcoin and few altcoins.
the whole point of cryptocurrencies such as bitcoin which are decentralized is that you no longer need a third party like a bank to handle your money for you. the point is that you handle all your own transactions (in one word you handle your own money). banks are basically useless when it comes to bitcoin.
all you can say is that we may need a much simpler version of the banks that offer some of the services a banks does.