Ask HN: Developers in the Blockchain industry: Why haven't you retired yet?

I have a hard time understanding how one can work for a Blockchain company/in the industry and hasn't made enough money for retirement?

You probably work in this industry because you believe in it, and if you do, how can after 1-2 bullruns you bot have enough money?

Or did you just not invest in the projects you are part of/interested in?