I think Bitcoin's can't make the banks disappear at least in our nearest future, because banks are having already a very big community using and supporting it's services till now. But in time it's possible that Bitcoin will be used more than banks
Yes in actual its true but actually why would we want bitcoins to disappear banks ? Both can run because none of them influence the other in any manner. I think the best way is bitcoins to store money though

True, and there are some people who even talk of Bitcoin banks, I mean where people would like to save their coins to get interest on it...
Not a good idea TBH, but still, if both can run in a parallel manner, that would be all okay...