If you win this day, you feel that you are lucky and then you will come back to the casino to gamble (greed). Now if the table turns down to you and you lose today, you will feel that you need to get your money back and will gamble again until you lose your money again (revenge). This is the reason why gamblers are getting addicted into gambling.
Gambling creates this endless cycle wherein an individual gets stuck on a continuous loop of winning and losing, getting lost in the illusion that he/she can overcome his/her losses by betting again. Due to this conflict, one may think that he is actually earning cash but in reality, his losses are overwhelmingly more than his winnings. In order to overcome this adversity, it is highly advisable that you set-up a limit in terms of your betting to avoid betting more than you planned for.