Both. When you are winning, you think you can do it continuously, which is not true because after winning, here comes a loss. When you are losing, you keep thinking you can win it back, which is also not true because it will continue to fall until your bankroll is gone. The same cycle will happen every time you play. The more you play, the more you get addicted without realizing that it's hard to quit with those losses you've accumulated.
Why do people like to gamble, even addicted to gambling? Most of the answers are because of joy, money, or stimulation. Winners for fun, losers for money and stimulation.
If they win, Of course that person is not a gambling addict. Do you know the definition of gambling addiction? It is impossible for a winner in gambling to be an addict. Because winners always have a strong stance in gambling, they know how to play in the right place and stop at the right time.
As for those who lose, the more they lose, the more bitter they become. The more they lose, the more they want to continue playing, and have to play even bigger to get back what they lost. Even when they lose everything, they still desire to "burn themselves" into gambling pits day and night. The circle of addiction keeps spinning, with no end in sight.