I beats me why some people still believe that gambling can be more "promising". In trading you can at least hope to evaluate fundamentals and expect the prices to rise or fall in the near future unless these fundamentals have already been priced in. But in casino gambling, such as dice, your only chance at winning is pure luck, except when you can change the odds in your favor somehow. The longer you play the less importance and effect luck will have because it will be largely overridden by house edge. It is not particularly different in trading either, given that the market has its own "house edge" over a typical trader, but at least milking the market as via arbitrage is not considered illegal here.