This is a question that's puzzled me for some time. If one is a consistently profitable trader, than what would be their motivation to work for somebody else, whether at Goldman Sachs or a small prop shop, as opposed to just trading from home with their own capital? For me at least, the major draw of trading (beyond that I rather enjoy it) is that I CAN work from home, I'm working only for myself, I get to choose when and how much I work, and so forth. If I were able to make consistent good money this way, I think the last thing I'd do would be to take on a normal day job working for the Man, even if that job is trading from an office. This is especially the case for those investment banker types who work 200 hours a week. I can see that you might take a job with a firm in order to receive training, or because you lack the capital to go out on your own, but why else would anyone do it?