I do not think that the world will refuse paper money, at least in the short term. Many regions are still on the verge of poverty, the climate is changing, natural disasters are increasingly occurring. In order to be able to refuse paper money and switch to non-cash types of payments, in ordinary currency and cryptocurrency, a high level of development of civilization is necessary, and above all, a high level of income of citizens. Only some highly developed states can try to do this, but I do not see this as a significant need.