In the current situation I think paper money will not disappear. There are many things to consider and in reality it's not easy to be used this online currency. Because others can't adopt easily this online currency and paper money is still the original use even in the future.
Yeah that's true and I believe that it will never happened that future paper money disappear because some of the population here are not using currency also they are not aware on how to use it unless if the government teach us all on how to use it.