I assume that it is quite possible in the future. Cryptocurrency it something new and us still not clear. We use it only as the instrument of speculation now.
Moreover, cryptocurrency does not yet have legality. There are still many countries that limit and prohibit the use of cryptocurrency. In addition, the bank has a clear legal status, centralization.
Until recently, there was a lot of information that users want to destroy the banking system, so that the crypto currency would give opportunities for users and Independence in financial terms. But today, in many cases, they want to combine the crypto currency with the banking system and use this hybrid for its intended purpose. I think that when implementing the crypto currency, each government will work in this direction very much.