According to a study conducted by researchers at Imperial College London, cryptocurrency has the potential to become a form of payment that is widely used for decades to come. In their research report entitled "Cryptocurrency: Overcoming Barriers to Trust and Adoption" Professor Imperial College London, William Knottenbelt, and Imperial College Business School Dr. Zeynup Gurguc, argue that cryptocurrency has so far acted as a store of value like a fiat currency.
That still depends on the governments on that time. In addition to that, all the economic status of every country should be normally distributed so that it is easier to be agreed upon by the majority. Nevertheless, this will still take time because as you can see the market is very unhealthy now and we need more innovations.