Since bitcoin and other digital currencies are such a game changer for the traditional economics systems, could there be any government policies that can be devastating to this new market? and even if governments in North America or Europe might not be able to do such things, how about policies from other more centralized countries that could bring the same effect?
I think goverment will never create a regulation about bitcoin and the matter of fact that goverment don't really cares what will happening in bitcoin now as long as they are earning in real world and if they are going to charge trading and transaction well let's wait until the news further.
Who knows. Since bitcoin is affecting people and been used by people, for sure government might create or formulate a law. Though they never care about bitcoin, but if it is affecting the community, and there are crimes (theft, or worst than that ) that happens because of bitcoin, for sure they will do something and create a law to mitigate the problem.
Crimes happen not because of Bitcoin but because there are criminals (or wouldbe criminals until they get caught and convicted). Blaming Bitcoin is like blaming the gun and not the guy who pulled the trigger. Though you are right, at least to a degree, that governments don't care and more often than not just don't want to deal with the real causes of a problem