There are high possibilities that the real or paper money we currently use today may not be effective again in the future for transactions. We may see something similar to the postal service which s not common anymore.
In the future crypto money will probably accompany paper money as a means of payment both locally and internationally, because paper money will not disappear because it has been used for so long. Even though crypto money is still new, not many can use it. But crypto money is slowly being used in various countries.