It might meant that you should only gamble the money that you can afford to lose. And it's not about the stake or how much money you can win. Of course, we want to win big, but if you talk about that saying it's all about the money that you can spend. So let's say in a given night, you have "extra" money like $100.00. So you only gamble with that money, nothing more, nothing less. And then it depends on your game, maybe you are a slot player and maybe just bet $0.20 as a minimum and play as long as you can until your capital is busted. But in case that you win, then it's good for you. Maybe what other smart gamblers did, withdraw that initial capital that you have, so that will be $100.00. And then continue with the money that you win.