It's part of the strategy. If you look at casino games, they don't have a strategy that works. People just put money in, click start, and wait for the result. There's nothing they can do. If they use martigale, they'll also have to use their bankroll well. So, the bankroll will be part of the strategy. Even in sports betting, if someone wants to be successful and create a strategy, they'll be forced to have an efficient bankroll management strategy. I think it's not possible to have a game strategy without a bankroll strategy. These two things are linked.