I think it we will just minimize the use of it, fiat dollar and other fiats currencies, and enjoy more the use of crypto-currencies. It is because we live in a world where the government gives true peace for each country.
Well, if the government started using bitcoin or the technology, then that will be a great move. But for now, I think that will be far from happening.
I do not believe crypto money will replace fiat money. Because paper money has been used for hundreds of years, the first crypto money, bitcoin, was created 10 years ago. Bitcoin can't be a global digital currency, because many countries reject Bitcoin. So there is still a lack that Bitcoin must be able to harmonize with countries in the world to accept bitcoin. This is what must be agreed by all countries and bitcoin.