Well, I believed mass adoption will start those who lead in the country or as a president and accepted it legally --so I think you are right. Regulation is very important but it is not mandatory at all. Because we can still adopt bitcoin without knowing by the government if they will still insist on the regulation process. As I see it is not hard to accelerate mass adoption if your country does not have any negative comments about this.
With or without them, bitcoin price will always increase the price.