Anyway, reading about Bitfufu aka Bitmain expansion of hashrate to nearly 30EH, it seems Bitmain is planning to go back to being a mining superpower and not just a major seller of hashrate, it would be very difficult for those large miners to compete against Bitmain especially now that Bitmain also operates mainly in the U.S.
And this is the danger, which could create a mining monopoly. You have the largest machine manufacturer, with the largest pool and number of machines operating in the world.
Unfortunately, I increasingly have the feeling that whoever has control over mining can control Bitcoin. With small and medium-sized miners closing operations.