I don't get what you are pointing at...No one will force anyone to deposit their money to a bank, we are living in a free world and government is not forcing us to deposit our money to banks... Except if you mean that if everyone who deposit in the bank is exposing their money to the authority, well, there's nothing wrong with that, except if you are doing something illicit and not paying taxes and laundering your money... Bitcoin is a good option to store our money, but it will never replace banks functions...