Paper money would still exist.Most of people in under developed countries still dont even have bank accounts and they don't have credit cards.They are not familiar with digital transactions.Senior citizens still believe that paper money is the real money which they could feel in their hands.Even indian government tried to demonitize huge value currencies and tried to change people to digital transactions,but it could not.
Yes, many are simply afraid to use electronic money, it is easier for them to feel the real money in their hands. Thus, paper money will always be at least for some part of the population.