Addiction comes when you lose a little amount of money every day and winning a huge amount of money after a couple loss. that's where it starts it's based on our emotion. When we think that we're making a lot of money through gambling we think that we're actually always winning without thinking that we already lost a lot of money upon playing it everyday. in terms of playing recklessly it mostly comes after a you win some and you constantly losing that's where it starts because you wanna feel that excitement again that feeling of winning. So you tend to bet higher in order to get your loses.