You were experimenting with sports betting and found yourself profitable with your strategy. However, you can’t raise a bigger bankroll to generate larger profits. Then there’s this one guy who believes in you and is willing to lend you money, of course, with interest, almost like a loan shark rate. The question is, would you see this as an opportunity or just a trap?
I will consider it to be a trap, not an opportunity, because those loan sharks are just after how they can manipulate you to get a life-ending profit out of you, and on the other hand, it's better to risk what you can afford.
No matter how convincing you consider your experiment to be a winning one, the fact that gambling results can never be 100% predictable is enough to give you doubt not to take a loan and place a bet.