Why is someone get addicted to gambling once he gamble ?
Because the individual gambler allowed the addiction to be input to their behavior of playing gamble. Until it became their habit, then as time goes by they've became addicted in the games inside the gambling sites.
That's what will happen when greed come in. Trying to win more even if you already had enough. Addiction is something that cannot be stopped specially when you are also on the losing side. Trying to win back everything that is lost even if just thinking of getting back the capital without win. That is where it will start to where you will lose more.
Been there, doing it at Yobit with their dice to which I thought I am on the winning side and truly lucky but after all of that I lost everything.
Its about greed when greed got you and believe me it will get you everytime, then addiction will began to take a hold off you. And the greed factor ramped right up and that your every win should be more than your previous win but when you lost you want to get it all back and more likely that your biggest lost were all result of attempts to win more which didn't happened. Sometimes it is also about ego. You can't let the casino beat you, you should be one winning here, not them, you have to him thus, you start to chase all your losses but ended up losing it all anyways.
Greed is one thing that makes a lot of gamblers become addicted, greed and ego are the main cause that people keep on gambling to achieve more winning or to replace the lost, before you start to gambling you need to have a strong heart to release the money, you need to think that you are gamble to lose, so act like the winning is as a bonus
And for those people who hate to lose, that is why they get addicted to gambling. They are not going to stop until they achieve their mindset, that they are going to win all back the money that they have lost, for their efforts not to end up nothing, though, most of the time, they failed, and even lose more money than they are expecting.
In the end, the worst case scenario that could happen to them is that they will end with an empty wallet, full of debts, and so on, and I know that gambling addiction is not that easy to quit, that is why, before we take that path of gambling, we must have self-control in order to not be addicted, and could easily manage the money that we are going to spend on gambling on a day, and not just going to spend until the last bitcoin that we have in our wallet.
If you are losing big times and still you think that you are going to win is just ridiculous to be frank,i don't have an addiction to worry about as i am not a big time gambler and i wont deposit more than i could lose. 
