As long as there is a decentralized cryptocurrency, governments will try to control it as much as possible. This process of confrontation will last for a very long time, since, indeed, the cryptocurrency has many opportunities to resist such control.
Over time, a certain golden mean should be worked out in this matter, which should generally suit both cryptocurrency owners and the government.
Bitcoin is the decentralized currency and it was not able to control by the government as of now.This made bitcoin unique from other cryptocurrency.
Some government legalized the bitcoin and try to get the tax for it.By legalizing ,the flow of bitcoin is some what control by some government.