That's true but almost all people are earning their salary in fiat and it will continue in future too, so I don't think that paper money will simply disappear in future.
I agree , paper money would be difficult to disappear in future since we used it for how many years and its the traditional way. Even bitcoin exist but it couldnt replace paper money in everyday living. Most of the people would prefer using paper money than bitcoin itself. Paper money in future would stood still even if there are other competencies out there.
Yeah but we will be really old by then if not dead already. It still takes a some generations to only have computer literate people on this world. But it will definitely be coming.