Just as the digital era, the photographic industry witnessed the bankruptcy of Kodak, the rise of online music, the disc has also been quickly eliminated, after the advent of bitcoin, the financial industry may also need to carry out major rectification. Will the bank disappear?
I don't think so. Not going to happen. The question is like "Will cryptocurrency replace fiat?".
First, Bitcoin in nature is limited
no internet connection, no bitcoin
no electric power, no bitcoin
no electronic device, no bitcoin
etc...etc
In fact it will do just the opposite. Bitcoin or cryptocurrency in general will boost the financial/banking industry. People will have/earn more money because of bitcoin. And where do you think people put there money for safety? To the bank. Where do business put their money where they earned from bitcoin earners who purchases or ask services from them? To the bank.
"Bitcoin'ers" will and always will transfer there digitals to fiat no matter what. Because bitcoin is being used as an investment/asset rather than as a currency.