I'm a faithful believer that it will not disappear and that it will coexist along with the cryptocurrencies, although I do not remove the side or the possibility that it disappears and that in 20 years I will be displaced by cryptocurrencies.
Yes, this is because of the full guarantee of the country, paper money is the symbol of the country so the country will do everything to make paper money survive, besides with paper money then everyone can transact.