That means he has already set his own strategy for the bankroll by increasing the stake when the amount is big or decrease the stake but some people has a flat amount of staking. And normally it is not everyone has gambling strategy and whenever they visit the casino they play any game of their choice and left. And the only strategy I have in gambling is the analysis of the sports betting games like look into the two teams I want to bet on, who has the highest win in their previous games and the teammates of the two teams.
Yes, that's the case for him but it's might not be the right decision all the time because when you increase your staking amount per spin, you stand the chance to quickly get liquidated compare to someone who is only staking with a small amount no matter how big his bankroll is. Although what ever has advantage also has disadvantages too, he wants to stake with high amount so that his winnings can be big too but that can lead to quick liquidation.