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.
Maybe next ten years it can be used widely, but i don't think we can guarantee bitcoin will be like that in future and maybe in future many great crypto currency created that can be rival bitcoin.
Possible yes because we are always promoting bitcoin to be more exploded and circulate until reach on top of what we desired to be great chances of users and holder ahead of non believers we can used two currency bitcoin and Fiat.