OP, that moment that you have to say your question is SERIOUS.
We dont know but there is always possiblities that banking system be behind cryptocurrencies. How come that unknown person build this crypto with no one will help him/her. Ofcourse the owner of bitcoin build a team and they are working together for the bitcoin's future. There is always a backup. In business there is always partnership.
Why would banks create something that will ultimately destroy them? Bitcoin is everything that they are not. and if bitcoin succeed, it will render the banks useless.