Any entity without reasons will not survive and I believe this is time for banks to change themselves. By considering bitcoin as game changer, we can expect the total banking concept itself may get fade away. When people are not finding their comfort with banking system, it would be obvious that banks will lose their dominance.
Hmm, Banks exist because of a reason, certainly bank will survive. They are critical for to the stability of world wide financial system and the government themselves won't allow it to collapse. We can see Bitcoin long faded but Banks, never.
Central Banks maybe losing control at this point but they are always evolving, changing policies and rules to adopt for the current situation, they are even backed by the government legislation to make sure that they are always strengthen. Once they had adjusted, they will again regain control.
I also think that the banks will survive. They are controlled by the government. Banks control the distribution and flow of maternity money. Without them, the functioning of the monetary system is no longer possible.