Very likely, especially now that direct transactions using paper money continues to decrease, paper money becomes a crime factor that is robbery, if there is no paper money of course can reduce the robbery in banks or to people so I am sure that no more than 100 years paper money will disappear.
indeed possibility is certain, but it takes a long time, because as we know cryptocurrency is still a lot of hackers, so the government is still considering a lot of things
I think paper money will continue to use, especially when with paper money, we have to pay taxes directly. however, the use of digital money will not make the tax increase. well, the government will certainly think it well before eliminating it.