I prefer not to use my profit because it's already a profit, with your initial balance, it's better not to use it so you can play in peace. I think it's better when your profit is already above the initial amount or equal to it meaning if you deposited, 0.1 and when you gambled and made it to 0.2, and I will withdraw already the 0.1 profit and play again with my initial bet.
So you play against also for your profit. Because you deposit 0.1
BTC then if this would doubled and make 0.2
BTC you will withdraw the 0.1
BTC that its your bankroll. And you will again the remaining that its your profit? 0.1
BTC am i right? Because that's what i'm thingking
to me i think that is really a good idea about good thinking if you really want to make profit you need to withdraw your investment first and then to play with your profit, through this way you can really prevent yourself from lost and can also make some good profit that most of the people cannot make in gambling.