If it's something made by the government or by banks then you should definitly know that it won't be private and they will have control of everything just like the banks right , nothing much will change .
and for what comes to the Paper money I don't think it will dissapaear , maybe on some countries yes but worldwide ?definitly not because some countries don't even use Credit cards for their transactions so ... yep
The paper money is going to continue to exist and I do not believe that it will disappear with in 20 years. Maybe later on in the future it will disappear but I am sure that it will not happen any time soon.
governments will only get rid of physical money when all people around the world have access to internet so they can have a mobile wallet which allows them to transact digitally without any problems. as long as that doesn't happen, physical money will continue to exist. and especially when it comes to third world countries. these people need it the most.