...Imagine you do what you are meant to do, and in doing it well, you got something more from it, like a reward or praise or recognition. That is what happens when you are good at trading, people start to want to hear you speak. You could even engage in mega events like Trading Showdown and show people your portfolio and how much of a gain you have made from it, and your followers get to benefit too...
I've never heard of such successful traders who want to go public. It is possible that this is due to the fact that they wish to remain anonymous and not attract excessive attention from the public and fiscal authorities.