That will not happen. But I think that will not happen so fast. That is not so good for the people.
I think that more people will use also normal banks. And they dont know how to use Bitcoin.
Even I am thinking the same, bank will not disappear. may be bank will accepts bitcoin as a one of mode of payment.
Include me in your team guys.. I also don't think banks will disapear. I think it will never happen. banks have their own importance