In the short term, luck matters, and in the long term, skills matter. The most attractive thing about Texas Hold'em is that luck matters too much in the short term, which easily gives people the illusion that they can win. That's why there are so many players willing to play this game. If you lose every day, you won't be interested in playing. But in the long term, luck will return to the mean. In the end, it must be skills, and it depends on whether your trading model has made a positive EV decision.