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.
Agree. Btw, not only bitcoin but much more other promising cryptocurrencies - skycoin, cryptyk and many others can become widely used. Maybe there even will be a way to pay anywhere in any cryptocurrency you'd like.