Mostly, here I hear about how dangerous loss is, it ends many lives and can put someone in big trouble. This is a clear issue, and people are protecting themselves from it. However, there is another thing that can also ruin one's life, and that is winning. Winning is the sweet and a pleasurable trap where you can stuck your life happily without knowing that it engulfs you until it comes to an end.
If we look into it, it is not the winnings that is dangerous, it is the reaction and how the winning person reacts and how he looks into things when he wins. If one got drunk with the victory and forgot about reality, thinking that he could duplicate to triplicate his winnings so he goes on a spending spree and bets recklessly until he finds out that he is chasing winnings and all his savings are emptied. It is not the time when he won's fault but the time when he forgot that the gambling result is random.
When you win, you think that you know gambling better and assume that luck is on your side, which leads you to jump into a big risky bet. You start losing, and at that stage, you change your mind to recover the money that you lost and start chasing it, falling into the trap. All your winnings and original money are gone, leaving only regret and sadness on your side.
In this case, winning does not mean the person goes into financial ruin; it is the losses. As stated in the earlier reply, it is not the win that does the damage; it is the greediness of the person and wanting to win more.