Earlier quoted context omitted.
I wonder how much coal China burned to fabricate all the computers necessary for you to post this and for everyone else to read it.
Looks like you're being downvoted by all of the people that refuse to own up to their own hypocrisy over this issue. You're exactly correct, of course. China manufactures the vast majority of this equipment, and China runs on coal.
We need computers for a lot of solid, real life uses.
We don't need cryptocurrencies for almost anything being peddled. They're supposed to be decentralized, but you can't really use them that way in 99% of situations. They're supposed to be currencies and instead they're vehicles for speculation. Etc.
I think their slogan should be: "You don't really need cryptocurrencies for that".