When you have managed to win, the most correct thing to do is to withdraw the winnings, although continuing gambling is our own right, but at least we must be able to take advantage of the opportunities that already exist rather than regretting it in the end which is useless.
Very possible, as that win just fueled your intention to keep aiming for more win to comes up, but in just a single mistake it will start the problem, you'll be more aggressive and you'll be adding more money instead of limiting yourself to keep pushing for more and trying either to win back or recover but eventually that greed inside you will push you to keep playing without any limitations.
It will lead you to lose more instead of having fun and gaining little but instead you push and lose more than you can let go.
The saying gambling is a shortcut to poverty is true, but this only applies to those who have the wrong mindset and cannot control themselves well when gambling, because in my opinion with those who gamble wisely they will not experience poverty because they already know that this is just entertainment that uses money as a ticket and if it is indeed a series can get a reward.
Only happens to those who are unprepared or to those who thinks that gambling is a shortcut way to earn money, that misconceptions with gambling are factors that can lead you to lose a lot, same with what you mentioned, if you are not willing to let go the amount of your initial capital most of the time you'll keep on topping and keep experiencing the same outcome, you only realize that you already lose a lot when your savings is already empty.