Re: basketball or football: Which sport is more profitable in relation to sports bet
It's not about the sports, but it's about to find the EV+ bets.
Even you're familiar with both basketball and football, if you can't find EV+ bets, then you're taking the same risk and neither of both is more profitable.
If you don't know what is EV+ you can read this article https://www.oddsshopper.com/articles/betting-101/positive-expected-value-explained-finding-ev-sports-betting-y10
Even you're familiar with both basketball and football, if you can't find EV+ bets, then you're taking the same risk and neither of both is more profitable.
If you don't know what is EV+ you can read this article https://www.oddsshopper.com/articles/betting-101/positive-expected-value-explained-finding-ev-sports-betting-y10
And according to him, quite successfully. I'm not risking using his tactics. 
You made a good decision, relying on someone just because he said it's successful isn't good. There's no proof if he's really making money through gambling.