Bank will never be disappeared if they becoming scam lots of people are going to file a case for those owner of a banks, Well from me banks are stsrting adopting bitcoins ad technology base in my country we can deposit our bitcoins into banks.
I do believe it too that bitcoin is not going to make the banks disappear. Because it is one of the most important body of government that regulates the flow of money in a society. Because the government is not able to control bitcoins if the banks are going to be gone because of bitcoins. And no one is able to regulate and control bitcoins because in reality no body of government is able to do that.
It's really impossible that bitcoin can really banks disappear most of all banks are in the long run and it will linked in some of companies world wide although bitcoin is not yet linked and can't be deposited on the banks only in trading sites. If goverment imports bitcoin to there business and it will become legal as physical currency then bitcoin and banks will be partnered soon that bitcoin can be easily deposit to any bank branch world wide.