The strategies proposed here are sketchy at best. No specifics given, very la-la land. While I agree that proof of work cryptocurrencies are currently weighing on our power-generation abilities and on the environment, one could argue banks are worse.

Decentralized currencies do away with reckless money printing and other evils, and for that reason they are the future.

I'm sure many were concerned about the environmental impact of the internet, and yet here we are. We'll find a way to make it work.