Gamblers can follow this method if new gamblers have trouble making correct gambling decisions. Assume that when a gambler starts gambling there is some chance of losing money but if the gambler gains some amount of money by gambling then he should cash out the capital by keeping part of the profit in the gambling account.
The theory that looks very easy but you will not easily apply it not because gamblers are inconsistent but because in gambling there is a sense of curiosity that often makes gamblers break what has become their rules.
Several times this strategy is quite effective for me, but not in this month where all capital including profit results were lost because of curiosity with less than pleasant results even though if I make a withdrawal the final result is still profit but the profit is not pleasant enough so I keep playing and lose everything.
So maybe you can do it but it won't always work..