So lets say that the Chinese government declares mining illegal & takes over the mines (likely to happen). Seeing that the vast majority of mining takes place in China, couldn't the government hypothetically reach over 51% of the bitcoin hashing power and basically centralize global bitcoin?
What cryptos, if any, are immune to this "51% attack" ? Is it even an issue? I'm not that well informed on the details of this subject so excuse my ignorance.
If the Chinese government took over the mining facilities and companies in their country regardless of what scheme they've done to do so, they will not get the majority of Bitcoin. Even they literally own the 50%+1 of the hash power required, a Hard fork will be made immediately and will kill the chain which China holds. This is the most probable defensive act that will happen. So in the end, Bitcoin will still be decentralized.