The people who work at failing startups are often successful people. They get other jobs.
Money as they keep telling us doesn't make you happy.
I live in an area where rich folk come to retire. It's sad seeing old men get excited about surfing, snorkelling, SUPing, kitesurfing, rock climbing... you guys could have been doing this 20 years ago, but you chased the big fat $$$ ... I guess at the time it made them happy. Successful. I don't know. Is there a real answer to the question?