I still play with my profit simply because I want to enjoy more of my gambling habit. Sometimes I think that its better to quit while you are winning. But when I play I just want to have some fun or enjoyment, so If I won already, I keep my bankroll and then play with my profit but this time I just try to make a small bet and see if I can further stretch my winning moments. So I just enjoy it and when I lose, I quit, but if I got lucky and still won then I continue to play and enjoy. I don't try to chase money that came from winnings. That is why I just stop when all my previous winning were lost already and happy that I didn't lose bankroll.
Just don't! If you are winning, leave the table and run away and don't ever look back! That is how the gambling sites, casinos and sports books get you!
They let you think you can win some more money but they just want you to gamble some more and in the end they will win back all the money you got.
If you win money, take it home.