It won't play any role in future. Bitcoin is already a part of our future and part of money system revolution. Yes, it has too many problems now and it can't right now become a currency, but in future it will!
I agree, he can already be said to be part of this future, but that he would still have to go a long way to this
Bitcoin will not only play a big role in the future, it also has the big role in the past. As we all know, bitcoin is the first successful crypto currency ever made in the history, without being invented, crypto currency will not be blooming years from now.
In the future, I think I will not be looking on the role it will play, because I know it will be big, but I will look how it is developed for the greater purpose it will bring to people.