I am not a teenager, nor am I a Paul Ehrlich fan. In fact I have the opposite beliefs as his. But Ehrlich's economics has nothing to do with whether or not the population will crash.
Population crashing has to do with actions of governments and stupid billionaires’ propaganda campaigns.
So Musk has more to do with the population crashing than any Chicken Little scenario. Musk and Gates and their crowd are the Chicken Littles.