Depends on who “us” is. Musk and his close friends? Sure. The rest of us? Well, in his view, the majority of humanity is a stepping stone to a future for his lineage to live on through space travel and colonization. This isn’t an exaggeration, though I don’t have my sources on this handy as it’s been a while so take it with a grain of salt. But Musk’s altruism has largely always been about making himself look good, and less about helping people.

FTR I don't think he thought he could save us, I think he thought he could do cool stuff (space and EVs) and now says climate change isn't as bad as he used to think (despite mountains of evidence to the contrary).