Before the existence of bitcoin they're many other digital economic assets that is in line with government policies like crude oil, gold and much more, government where comfortable with this assets trading online, including forex but crypto currency like bitcoin that would have change lives and alienates poverty from the world, government are afraid of its cumulative value.
This governments you're seeing have their own reasons for doing such, although it's for their own selfish interests, those other forms of asset you've mentioned were all centralized and government can implement a constant regulations on them, but consider bitcoin being a digital cryptocurrencies that is decentralized, this means there's no central authorities that guides the use, trade or acceptabilities of bitcoin use, bitcoin is self moderated through it protocols, ot even the miners or any other developer can make changes to manipulate or control the bitcoin network.
Bitcoin is an assets that we shouldn't lose or allow to dies off, if you check history of all money weather digital or paper bitcoin circulate faster in values and distributions. As highly respected as dollars not all countries have it but bitcoin is 14 years now, the world is aware of it. Do you think bitcoin will stay if government totally remove their hands or stand against it?
They never come out to declare their support ror bitcoin and we already assume they are against it except for countries where bitcoin remains a legal tender and where the use of bitcoin is legal, that's why some deemed fot to place ban on use of bitcoin in their country because they don't want the new monetary system out of their ignorance, yet upon all these attacks, bitcoin adopt is increasing and bitcoin is still acceptable as a legal means or making payments.