NOTHING, man does short of a nuclear Apocalypse will "destroy the earth". And even then it will come back. Earth has been here billions of years and it will be here billions of years after mankind exterminates itself.
Yes indeed. And Satoshi Nakamoto will go down in history as the first human to invent a technology that wiped out mankind. And since Elon Musk knows that space travel is impossible, he's pissed off and trying to tank this proof of work beast.