im sure it can...but it will take a long time to make bank dissapear...
but make sure that all people know what is btc...in my country just a less people know bitcoin...
I do not understand your thoughts, but in my opinion the bank can not disappear because it is a big source of government revenue and they are trying to build that system and it is not easy for it to disappear on the substitution By the Bitcoin system. On the other hand bitcoin does not bring any benefit to the government. In addition the banking system can not disappear when the cash system persists in our lives.
I agree on this, rebuilding the system of government-bank relationship to government-bitcoin relationship is hard, considering that bitcoin is not fully a standard/stable thing unlike bank that has been here for a long time, Maybe Bitcoin will be a part of the BANKS. I think Banks are still more powerful than Bitcoin.