Elon Musk talked about how BTC mining with electricity isn't environment friendly but he invented electric cars, in near future if this actually becomes popular electric cars will be available world wide and billions of vehicles will be charged by electricity so how is this environment friendly?
Its what you called publicity mate. He is also wise when he did announced it. Why? Of course some elon musk followers believe him and will panic sell on bitcoin and you know did happened right? However wr already anticipate that his move was to boost doge instead since he got out already from bitcoin and realize the multiplier is much stronger on dogecoin. See how tweets working so far. So I think elon is just playing business here.