I once placed a random multiple bet with $3 and took home about $450. I know I had a good dose of luck, but by playing games considered low-odd and therefore with high odds, I got this.
That’s x150 odds, and honestly it’s really hard to hit. Even x100 is already tough in sports betting. so this isn’t the kind of strategy you can rely on consistently, especially if your goal is to build steady profit. It doesn’t need to be anything fancy, just stick to straight bets with proper bankroll management. What really needs improving is your selection skill.
Only what I think is that he can go for 10 odds instead of going for over 100 odds. But if he is betting with just $3, that is a good bet because $3 is an amount of money that someone can be able to lose.
If he is gambling on a single match, know that he might be tempted to use high amount of money and which I can not advise him to do but he can reduce the parley bet to like 10 odds.