I think that once the crypto currency is supported by the state, its value will fall! People do not want to pay taxes for crypto currency, it will hit the prestige of all the crypto currency. If the government controls the holders of the crypto currency, it will sharply lower the rating of the cryptomir. But on the other hand, not paying attention to the crypto currency will lead to the collapse of the economy as a whole. What do I see solutions to problems? All the Crypto currency is taxed, but very low. And give society absolute freedom of action with its crypto money!