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I guess people will mine it since it is profitable. But, it is millions of dollars waste of money imo. A lot of the electricity used is probably also from non-sustainable and polluting energy resources. The responsible approach is the have a consensus to mine something that is much more energy efficient, Steem for example:)

or if I was to shill my favorite crypto, gridcoin, something that helps the research for cancer, aids, SETI etc :p

Still, keeping a stash of my precious BTC cause who knows how much they will be worth in a couple of years!