Closure of specialized businesses, power cut, ban on mining in certain areas, etc. China has shifted into high gear in recent weeks to limit the development of cryptocurrencies on its territory . Officially, it is a question of the environmental impact of cryptocurrencies, which use a lot of energy. Behind the scenes, it is more a question of economic and political issues, in a country where the surveillance of citizens by the authorities is becoming more and more powerful, driven by technological development. Gilles Quoistiaux, Trends-Tendances journalist, expert on the issue of cryptocurrencies, answers our questions on this subject. Before…