Dude , let me make you understand that Bitcoin is not treated as a currency , but as an investment . And what according to you are banks. It's just a place to deposit or withdraw money and they will give you a certain interest on it. Bitcoin is a very bad currency , its prices fluctuate alot and people will obviously choose their countries currency over Bitcoin and so banks will always be in use no Matter what
Yes I agree with you, bitcoin is not a currency but the investment to get the profit and that profits can be cash out into our bank account, so I think the bank will still exist because transactions such as bitcoin requires the bank for deposit and withdraw