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It costs a lot to mine for real physical Gold as well. Are you advocating laws be passed to stop that frivolous use of resources?
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Which of course leads to the classic question, "Who died and made you ....... ?"

Well, I like the idea to save the planet for our next generation, while the idea to turn off the electricity on the whole planet doesn't sound for me as nice as the first one. So I would choose something in the middle - To make critical decisions only in the most urgent cases and to do something if there is a really huge need in it, moreover if it will have crucial consequences. Something like that :)

To mine 1 bitcoin, it would cost you an iPhone X for electricity. Imagine that haha