Nope the kind of "adoption" you are thinking of will not happen. Bitcoin is good for the dark markets, over-regulated systems, countries ruled by a dictator who controls everything or a country close to that situation and places where they make it hard for you to get and send money to your families. That is where Bitcoin's value come from. It comes from a place where the "mainstream" does not even to look into or to know.

In short, if it is "illegal" it is good for Bitcoin.