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".
For crypto speculation is <<the market>>.
0: https://hbr.org/2021/05/how-much-energy-does-bitcoin-actuall...
At this point in time, there is no reason to care about this. Maybe we start caring if some insane development happens and BTC suddenly starts representing 10-20% of our energy consumption. Until then, there are bigger problems to worry about.
We already have the technology and the land area.
The ability to tile a land area the size of a smaller American city with relatively bad solar panels to power half a percent of the world's energy usage is pretty amazing.