Investment and Sports Betting 
Not too bad for the reasons using bitcoin . But you should extra attentive because that have much risk , many ponzi site investment and gambling can losses your money rapidly.
Maybe Bitcoin is his investment?!
In terms of gambling you are right. I like to gamble either but only use very small amounts I use for that. It's mostly for having fun and not to make profits.Therefore gambling is indeed too unpredictable.But sometimes luck hits you like a lightning!
