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.
But this makes even harder to implement since decentralization is what were loving being here,i think if banks totally adapt with our blockchain technology and they accept us being anonymous then maybe that would be the start of this wallet security that youre looking for ,and ofcourse all of us here wanted this to be done