The governments of the world can't agree on anything. I wouldn't even consider it being an option of any of this happening until the institutional investors and the wealthy dump all of their Bitcoin. China has their cryptocurrency going...do you think that they consulted any governments before they did that?
Anyway, with all of your questions you subsequently dismiss anyone's responses and talk about Bitcoin dropping to nothing. Why even ask?
They have a hard time agreeing when they have oppoting views. In this case they have the same view of stopping Bitcoin to protect their own interests and currencies. So dont hold your breath.