With the increasing growth of digital currency, and use of digital currency in the world today at various trading platforms, one can't help but see the extinction of fiat currency in the long run.
Bitcoin is now accepted all over the world as a means of payment. This has aided in the difficulties encountered with exchange of currency from one fiat to another fiat. People from different countries can easily make payments transactions at ease.
With these advantage, there is every possibility that the world will choose cryptocurrency over fiat one day.