I may be misunderstanding your response but mine is really simple. I’m quite sure that the world economic system is indeed ultra-inefficient but it is, at least for the time being, sustaining the world economy — all the businesses, jobs, universities, schools, networks, industries, institutions etc. (basically everything, including Bitcoin) — while the Bitcoin system needs approximately the electricity used by Austria to run the bitcoin economy and practically nothing else. If you were to scale the Bitcoin economy up to match the world economy, then it really would need ALL THE ELECTRICITY. See what I mean?