No government has ever turned their face to any cryptocurrency, so there is not need to fear of them turning back, but they just can't fight against Bitcoin, so only thing they can do is to make more regulations.
They are probably thinking like this - If you can't beat them, then better join them.
Companies invest in many things not only in Bitcoin, so they are not stupid to crash the market like that and even if they want to do taht it would not be so easy.