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 banks will completely disappear but their impact and the way we rely on banks will decrease significantly. Once cryptocurrencies are more widely adopted and the prices become less volatile, they will be able to be used as a convenient trading currency.
Banks serve two main purposes; holding our money and lending us money. In time, holding our money in secure wallets will become safer and more user friendly - we are not there yet but the day will come. Furthermore, there are projects like SALT that are working towards a peer-to-peer lending platform which will reduce the need to loan money from the banks.