Greetings friend @crypto.piotr, great topic that you address in this article, from my opinion the fact that some countries are taking measures against cryptocurrencies is because they know that these are growing widely and as they have no control over them seek ways to restrict their use so that people who use them daily feel fear and stop using them, here a question arises why not attack them directly? and shield themselves in the environmental impact that these generate to be mined as in the case of China.

Governments know that cryptocurrencies are the future of the world economy and want to have them under their control at all costs, they see cryptocurrencies as a threat because they do not control them but if there were the possibility of doing so I assure you that they would speak wonders of them because it is for their benefit.