Capitalists and governments will always step in when there's money to be made. And if they can just keep printing money to buy BTC, then they could print themselves out of debt or just buy the entire world.
They can until someone finally realises their money is worthless and says "Precious metals, jewels or natural resources, please, I can wipe my ass with your paper". We are getting really close to that moment.
This. Once enough people realize that the paper is now worthless their game will be up. We aren't there yet, but the time may be close if the printing continues for long.