Bitcoin have lots of potential however it don't gonna replace banks or paper moneys in near future for sure as lots of people are still there in the world who can't even use electronic payment systems and for them bitcoin will be really hard system to understand.
A man can adopt on a certain situation if it is what was needed, so even if they don't know how to use bitcoin, for sure if it is the thing that is used by everyone, they will eventually learn about it. Just like cellphones, before this touch screens arrive, there are those old models and the telephone, but since everyone's into new cellphones, so the old people learn about it too. But anyway, even if everything go digital, there is no way that banks would fold, they have been there and tested by time.

banks will find a way, it's just to much to easy money to take a dive. maybe not all banks but the clever ones will find a way.