Why use big words to describe simple stuff? Banks in general are an attempt to exploit the limitations of money and therefore runs the risk of being rendered obsolete or incompatible depending on how currency (in this case) changes. There are plenty of other things that suffers the same threat of becoming useless and antique. Be it CD and cartridges for the purpose of distributing computer games and programs in the age of the internet, small plastic industry in the dawn of the affordable 3d printer or lets take something that has already come and gone, letters to contain your messages in the age of Email and instant messaging.

Lets be more specific however. What is the true commodity that Banks offer you? Its "Security" believe it or not with all the bank crashes and bullshit they pull today. What is the main property of Bitcoins? Its a crypto currency which means it comes into a direct conflict with the basics of Banks. Not only that but it also removes the physical restrictions of today's currencies that banks exploited.

Dont get me wrong you can still start new "banks" for bitcoin but they will be different.