I think it will even be the opposite and that means that the bitcoin will lose it from the banks!
I dont think that bitcoin or any other thing will make banks disappear, we are always in need for a place to store our money, we cant just put our money in our house or wallets, we need a safe place to store them in.
We cant really on bitcoin and online wallets because they are always related to the internet so if the internet goes down so is the bitcoin too. Banks may survive as people always will prefer having second options.
Bitcoin will dominate in future still banks will continue their services wherever bitcoin is not available.