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. This way if later the gambler makes a wrong decision and if he makes a wrong decision if he loses money then he will still lose part of his profit but in this case his capital will be safe.
Well I must say this is a good strategy especially for those that really want to be far from addictions but left for me I'll rather say it's not advisable because you might be pushed to go in more just as you keep getting more wins, I know how this things work and for one to understand this then he'll be better off limiting himself from this strategies but if he can control himself then it's cool. I only see this strategies as a very cunny way of not loosing your money and at the same time making sure you win,it's just confusing and not necessarily honestly just gamble and know your limits.