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.
As of the moment, cryptocurrency had already started to prove its worth as a system of payment and it satisfies many.
And i'd say the researchers back at Imperial College London is on track. And with news left and right of government's concern and may other people pushing bitcoin to be recognized as a store of value, i think we can expect bitcoin to be mainstream in less than 10 years into the future.
The only thing we would be needing is for the government to back bitcoin and other cryptocurrency as a recognized currency. What compromises cryptocurrency has to be made is unclear, but definitely there will be some major changes in the founding ideals when this happens.