I think a public stock market is a hard game to "good" at - far more luck based than other things. I mean it's a pretty efficient market with really high incent

I think a public stock market is a hard game to "good" at - far more luck based than other things. I mean it's a pretty efficient market with really high incentives to get information, and hence pricing, reflected in your positions. Whereas - a person opening a construction company just has to beat all the super-flakey contractors that already exist and of course sell like hell. This is far less luck than the stock market is.