Cryptocurrency is built on the foundation of a decentralized infrastructure. In that regard; i don't see banks playing any unique role in it tomorrow, except as an intermediary for conveyance and exchange of fund.

As regarding tomorrow; i see a cryptocurrency that is better harmonized and free from fraudulent  ICOs, owing to better regulations.

When this is achieved, i see investors pumping in fund into the system resulting in the market been headed for the moon.