Because cryptocurrency is not created by them, nor is it regulated. Something that governments can't control is usually something that they fear. Most of the governments say that this is in the benefit of their people, but I really don't think that's true, why would they start thinking at their citizens when it comes to crypto but they really don't mind them, when the people have nothing to eat, basic health care or a place to sleep? If they really would care they would do something to help those in need and raise the economy, with crypto being one of their last things to think of.