Bitcoin has a use, but there are other options for consensus algorithms that don't waste as much energy as the citizens of a medium sized country and fill the same user case (and other expanded use cases). Why not just do that?

Strictly speaking, the comment you're replying to doesn't say which of the two is a contest to waste resources and which has potential to have useful results.

Can you cite an useful result? I can't but I don't think that some people getting richer is useful.