If in trade everything depends only on yourself, then in gambling, only luck. Ie it turns out that in gambling, you are almost always a loser, despite the amount, in trade it's the other way round and it pleases.
actually both trading and gambling needs a luck , it was just that gambling on casino most of the time was just based in pure luck while in trading in addition to luck there is self discipline and other strong charcters so that you could become a good trader .
Most of the games in a casino is luck-based, which make it almost the same as trading. If you have a good investment, and you get lucky, that investment will turn out to be profitable.