At first I liked bitcoin because you don't need to have a bank to start earning. Anyone can just create his own bitcoin wallet and not upload any document at all. I don't think mixing up the idea of bitcoin and bank is a good idea. They are two opposite things. Bitcoin is anonymous and decentralized, while bank is not anonymous and is controlled by the government. The whole point of bitcoin will be destroyed if the idea of bitcoin bank is implemented. It'll be just like fiat.
Im still thinking, if there could be a bitcoin bank, certain rules need to obey, bitcoin transaction will also be the same with fiat transactions, it will not be convenient for user to go outside, fall in line at the bank teller. The idea of having bitcoin bank was not really a good idea. Transactions will never be the same. If you are going to invest using bitcoins its hassle to go to bank first and deposit. Unlike now you can buy bitcoins even at person to person.