I also agree with you all. bitcoin might not make disappear the bank, because the bank is a financial institution that is essential for the international economy
For each country banks are really needed because it is a body of government that is governing for the movement of money in the cycle of the economy. And they are the one who are moderating the use of money and flow of it in the system of a government. So if bitcoin is going to make banks disappear then our medium of currency will be somehow unstable.