Paper money would never be gone as long government do exist then its an absolute thing for it not to happen thats why this kind of what if situation is on impossible to impossible which it cant happen no matter what.

Lets just say nor focused on on those blind person you do mean on how they would deal with online payments.? Try to consider out on how they do make out some mobile banking nowadays and yes it cant really

be avoided that there are situations in life on where there are people who cant really possibly deal with a thing due to various condition which it makes impossible but doesnt mean that we cant really find a way.