if i build a bank of bitcoin that operating like a traditional fiat money bank when people can save the money and get interest for their saving and also people can get a loan from my bank but the fiat money is change for bitcoin, the question is would you guys trust me to save your bitcoin on my bitcoin bank that i want to build ?
It would be very difficult to entrust someone to save all of your bitcoin because nowadays there are a lot of hackers who could easily steal all of our bitcoin that was save on your bitcoin bank. So it will be better we should save each others bitcoin in our own wallets for good safety.