Do the government can not make a regulation to impose the collection of tax to cryptocurrency as billions of dollars passes everday to the users and investors who transact that huge money then it should apply to the users who do bitcoin transaction. This can make possible to the government if they pursuit a laws that addresses the cryptocurrency users to be taxed.
The government can only make a move to earn some amounts as tax from the crypto business if only there is a grant from these governments to accept the potentials of blockchain technology. You can't gain money from something that you despise and wanting its shutdown. I don't agree to the fact that governments want to make taxes out of crypto. That will centralize the blockchain tech.