Allright. I bite. Why is the energy cheap enough, to make big mining operations profitable? Why isn't it taxed if it is needed elsewhere. What happens, if there is to much energy being produced by plants? Why is it, that sometimes electricity gets sold for negative rates.

I am not a hardcore bitcoin fan, but I giggle a little when those transactions versus energy consumption arguments come up. Maybe my views are wrong, I would love to check if somebody can change my opinion on this topic.