It's true that sometimes taking a moment to savor your winnings is the best decision, because if you force yourself to keep pushing your luck, you might end up on a losing streak and lose even more money. Savoring your winnings can be a very good thing since those winning moments may not come back anytime soon.. by savoring them, you can at least enjoy the positive results of your game.
It's easier for saying than for practicing and practically it's really hard to control your emotion especially greediness so that gamblers struggle to stop their bets no matter they are in a good streak or bad streak. They don't plan to stop if they don't lose all money or don't win too big for becoming millionaires or billionaires. It is fact but very unfortunately for most of gamblers, as they usually will end up with losing all money they have or all won money they got previously.
Chance of becoming a millionaire or billionaire from gambling is very small and if they don't gamble responsibly and disciplined, they will lose big money before any millionaire or billionaire chance comes.