Okay, I admit my comment was a bit rushed, and I apologize for that. It's not tongue-in-cheek, and I don't feel that I'm rationalizing things (but then, I guess I wouldn't feel it even if I were).

I was trying to view things in a bigger picture. Ofcourse we are using too much fossil fuels at this time. Ofcourse our functioning is pretty unsustainable.

What I am trying to say, is that sometimes high energy usage is acceptable. Should we stop launching things in orbit? Should we stop the LHC?

I think that for _some_ people, having a thing such as bitcoin is worth the energy expenditure. It is perfectly okay that for you, it _isn't_ acceptable. I am not trying to convince you of anything. Just affirming that there exists a subset of humans that find value in it, and therefore are willing to allocate resources -- be that electrical energy, fiat money, or mindshare.