FOMO. This is what causes bubbles. Of course it isn't any consolation that people can keep getting rich off of overpriced assets for a long time. As the saying goes, "The stock market can remain irrational longer than you can remain solvent." In this case however, you aren't going insolvent, just suffering jealousy.

I'm not saying to jump in - the crash my come tomorrow. Or I'm not saying don't jump in - the asset prices may melt up with inflation and people who were out are left poorer. There are risks either way.

This doesn't apply to the high paying jobs I think. There you just have to decide what you really want and be happy with what you can get. As many other comments say, money doesn't equal happiness.