Of course you are right. Eight years ago I started a series of novels on climate change. I do believe the rich will try to escape the consequences. But food is finite and so is water. Would you swop your food or water for money? If I was Musk I'd be buying farmland in Northern Canada right now not twitter. I might also be building an underground city there, filled with advanced technology and implementing innovative food growing techniques. A single bunker won't do it I'm afraid.