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
it is really what you say but I am sure that in the future the government will adopt an economic system that uses crypto currencies so that it will make the country's economy more advanced and developing
I don't think so. The government is also thinking this in advance and crypto currencies will never be a common currency but digital currency will. The government will never let a technology like the Blockchain slips aways, they will be applying it. As far as I know there are banks studying the technology in order to make a development out of it.