I think banks will not disappear.
They can change or can work with bitcoins.
but they will never disappear as fiat will never disappear too.
If fiat comes to the point that has no use already,
then thats the only time that banks can disappear.
But as i have said, its impossible.
Yes I believe it too that banks will never disappear as long as the community are still using fiat on their daily life. Not everyone are using bitcoin these days and I believe fiat and bitcoin can co exist together. Maybe bank will disappear if the government will permanently remove fiats but i don't think its gonna happen anytime soon.
It will not as it only improves their quality and storing of money by using blockchain technology or smart contracts in time when most of the people don't use a banking. The only advantage of a bank is the money you put was safe.