There is no future for fiat money,paypal,skrill,perfectmoney,payza,payeer,payoneer and and other fiat money online wallet there are past.There is only future for cryptocurrencies which everybody almost likes 
I think in future paper money will still be the same because we are using bitcoin as a option we can not spend bitcoin directly to buying anything so new generation will still prefer to use paper money as bitcoin can be complicated for them so they will use paper money as they are using..