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?
The threat is that cryptocurrencies will be used to store money, send money, and be used for payments. All these functions are done by banks.
I dont think this has to be the end for banks for a couple of reasons. For one thing, another major function of banks is lending money. Cryptocurrencies cant replace that function directly. Secondly, banks can evolve to embrace this new technology. They could offer cryptocurrency banking and trading services. I think they will need to move in this direction if they want to survive.