I do not think Bitcoin be shut down.
The thing I know about it is Bitcoin will die if Internet die too. It is an humanity gift who has been made so good.
As you said cryptocurencies are unstoppable by law and moreover now gouvernment has adopted it too, like in Japan. That is a major ahead for us and profitable for them. A win-win situation.
I'm also feeling the same way, that the cat is out of the bag now and its reached a level now where there are too many people who like it all over the world to let it die now.
Exactly they're fighting a losing battle, if governments got on board they could see the benefits but they all about holding on to power and not sharing it