What will the future bring for the paper money we will never know that because there can hapepn allot of things you know i dont think that allot will use paper
money in the future only the illegal things.
As long as there will be there will be a third world country and poverty is very high and government want to retain its status including the banking sector paper money will stay and will not be going to replace. It will saty a very long time and cryptocurrency will just stay as an alternative money online and cannot survive offline. If money will disappear it will take a very long time maybe a hundred years from now.