If you want to play smart of course, play with profits, and you can save your bankroll to play the other day, therefore you will be disciplined and not throw your money in a short time.
This is the best thing to do and i like that way because i get get out in gambling nowadays once i enter and play when i won i play it again its kinda i felt crazy and greedy to earn much more than what i have and including my bankroll to roll it up.