I don't think this is all that surprising. Basically you want your wealth in a balanced portfolio of different companies, so that a downturn in a single compan

I don't think this is all that surprising. Basically you want your wealth in a balanced portfolio of different companies, so that a downturn in a single company's fortune doesn't affect you. Thus, a big win should be cashed out, otherwise it ends up being too a large a piece of your portfolio.