The first part is nonse however, because govs can really simply ban bitcoin by banning all the bussiness that accept it.. if no normal bussines (grocery, electronic, housing, energy, transport etc. etc. etc.) accept it, the price CRASHES= bitcoin is dead. (using it only in the black market wont save it). Decentralization is worthless argument here.
And if this happens how do you think people will react?
This is not a game for nerds anymore, there are serious money invested, serious businesses in the industry and global visibility thanks to internet.