Certain influence bitcoin on the banks, of course, will. However, such influence will not be significant. Bitcoin can not take on any functions of banks or replace their existence. Bitcoin just can not do it. Banks will provide services for the exchange of crypto currency after the legalization of the crypto currency by the states. They can also open bank accounts in crypto currency for individuals and legal entities whose activities will be related to the crypto currency. However, banks will not accept the crypto currency for depositary storage or issue loans in the crypto currency, because it will be too risky for banks.