I don't think that Bitcoin can make banks disappear. Because in my country there are more to be educated about the internet let alone Bitcoin.
So am sure Banks won't disappear but Bitcoin is here to stay.

Actually it is possible that bitcoin could make the banks disappear, and
Bitcoin Banks will be the one to replace it, but of course it would happen in the future and not now. If bitcoin would be declare as a currency which it could be accepted anywhere, anytime, in every places around the world, then this thing could really happen, well, I'm not that sure about it, it is just a thought since Japan already accepts bitcoin as a currency.