I think you should first explain what you mean by mass adoption

That is, what fields should Bitcoin be used in to count as "mass-adopted"? If it is about using it as a currency in its own right (like the dollar), it doesn't seem very likely because it lacks properties required for any such currency in the world today. Most importantly, its supply should be adjustable and variable according to the needs of the economy as it shrinks and expands. But Bitcoin will never be like that since its supply is algorithmic and kinda set in stone (read, it can't be changed beyond that)