You can find a good example of communists' vision about crypto when you see in the news that Venezuelan government is about to release its own cryptocurrency, the "Petro".

Looking for a way to overcome international financial sanctions, cryptocurrencies was like music for their ears (played by well know international communist advisors), because in their vision this is a weapon to fight against the "Imperialist" US Dollar.
Obviously, this will be a centralized coin, but I think they will seed a dangerous (for them) idea in people and they could not control anymore. It will be like opening the Pandora's box.
Regards,