The governments have a far more easy, and tried and true method of attacking crypto. Fear. Fear through misinformation, by working in unison with the media and the finance industry (who are driving the policies on this) and then fear of prosecution fines and jail time.
If another nation should wholeheartedly embrace the said taboo or even offer a safe haven for others, they will also be punished with fear, the fear of sanctions and then the fear of war (terrorism).
None of this is to say, that governments are not already doing any of the things you have suggested.