Cryptocurrencies are a problem. From the environmental disaster they cause (and social problems caused by higher electricity prices due to increased demand), to

Cryptocurrencies are a problem. From the environmental disaster they cause (and social problems caused by higher electricity prices due to increased demand), to tax evasion, illegal porn, or the fact that an important share of an entire generation became addicted to gambling under the guise of "technology". The real world has problems, and crypto currencies have made some of them possible. Far from making the world any better and bringing the current financial and political system down (lol), they made the world worse. As these problems become more evident and widespread, cryptocurrencies become a political problem. The world needs to deal with the problems they cause and the political solutions will differ. That's why people argues.