This news is slowly coming out but over half the Bitcoin miners are Chinese entities!
What would happen if the Chinese Govt took the mining over from the entities: It is a scary possibility and i was made aware of it on a you tube channel that has 200,000 subscribers!
If the Chinese Govt took over all the big minings farms, then they cut try to do a 51% attack, if that was what they wanted to do, but I really dont think that would happen.
Mining Bitcoins consume a lot of electric, so local governments will maybe try to close them down. But I think the minings farms would just move around if that becomes a problem.