i think it will never .
why ? because bitcoin say . nobody control your BTC and there is no fee . so if bitcoin had bank it will had fee and somebody will control it .
Banks not only charge fees - they also provide interest. This is one reason why people might be tempted to give their bitcoins to banks.
On control - I agree that we will be losing control if you give your coins to a bank. It is up to you to decide whether the interest offered is sufficient for the loss of control.
If a bank provides a service I want, I do not mind them charging me a fee. If there is no bank, I cannot borrow money.
Well there has not to be any bitcoins banks in my opinion we have the wallets and I think that is good enough.
Also a bitcoin bank will be less more controllable and untraceable so I do not think its a good idea at all.
well, this topic was more about an investment type of bank rather than just a simple wallet, for wallet you are right we can hold out own bitcoin with all sorts of different wallets but for a bank that pays interest there is no option available and if there is any, it is either scam or hard to trust.