Some governments tax bitcoin. They want to get more tax from bitcoin users. This is the reason. China went further and banned bitcoin.
I believe that sooner or later everything will change, goverment cant keep ignoring or banning bitcoin. Sooner or later they will realize this gem. It is about time that the government is aware of this. Some government even has take measurement to study about blockchain and the technology behind it and the other will follow soon
Whole depends how goverment will look at crypto cause they can't stop developing it into people thinking but they can't get some profits from it too, so just wait what they thinking will be in future.