the government worries that if the crypto currency enters the economy of a country, the government will not be able to control it and can damage the exchange rate of the country's currency, and the transaction cannot be monitored whether it is for good activities or actions that violate the law and harm the country or someone
Indeed, cryptocurrencies are a decentralized, anonymous currency when trading, so the government is very afraid of this because they will not control it. Also its appearance may affect the flat currency, damaging the country's exchange rate. No one knows in advance what the future is, whether electricity will be legal, but for the time being I haven't seen any effective solution for the government to accept it, maybe we need to have a bigger revolution.