90% of bettors tend to lose in sports betting in the long term primarily due to their game selections and, of course if they engage in excessive gambling or develop an addiction. As a sports gambler myself I believe that taking breaks and only betting on games where you have a good knowledge about it can greatly increase your chances of winning. If you continuously bet on matches involving teams or players you are unfamiliar with, you'll likely end up losing in the long run. In such cases you would essentially be relying on the lowest odds offered by gambling sites which are not always accurate.

Not all gamblers would lose in the long run, some may actually end up making a great profit if they possess a good understanding of how to catch opportunities. This is because occasionally there are favorable odds available that could yield returns of x2 or x3, which are comparatively less risky than betting on a team with odds of 1.3 or 1.4 especially if you have limited knowledge about that team or you don't even know anything about the game, like just follow the lowest odd thinking that you'll win it easily!