Here's an interesting article citing some recent research which claims that the majority of mining power is in China, and those miners may have some perks that others outside the country do not have.
Here's the article.
https://thenextweb.com/hardfork/2018/10/08/china-means-intent-destroy-bitcoin/ It talks about whether China could destroy Bitcoin, or perhaps use it in some other way.
What do you think? Does China control Bitcoin? If so, is it the government or no? Are these Chinese Bitcoin mining farms working together? What might China do with Bitcoin (government or no) in the future? AKA, attempt to destroy Bitcoin (would they be successful, do you think), use it to bring more wealth into the country or personal pockets, use it to attack other nations, etc?
One of the main things reader would need to take away from this research paper is this:
As of June 2018,over 80% of Bitcoin mining is performed by six mining pools [8], and five of those
six pools are managed by individuals or organizations located in China.
This is alarming. I do not think that in the event if China would size the Bitcoin, they would use it to get more wealth. I think that at the moment his could be a fail-safe if public start using BTC more in their own country or even China could use it as leverage over other countries.
But in ordr to understand what exactly is going on, journalists and rather researchers should investigate those 5 out of 8 mining pool owners and their ties to China to understand have vulnerable they are.