Any sport you know very well, you can gamble on those sport and avoid gambling on sports you know nothing about, one of the reasons why some set of people lose money a lot when it comes to gambling is because they gamble on sports they know nothing about with the slogan " gambling is all about luck" yes gambling involves luck but that those not mean skill and knowledge is not involve, if you gamble on sports you know nothing about then you are gambling blinding and your chance of winning are very small compared to when you know everything about that particular sport, when you know a lot about a particular sport prediction will be easy for you.
Is true that knowing everything about a particular sport those not grantee you winning always but is an added advantage when you are gambling because it brings you more wins.
This thread is underrated but to be honest, this is the best advice a gambler can give a fellow gambler in this new year. Don't gamble on something because you you see people are doing the same, you will only be losing without having the time to discuss that you actually won, don't copy others because you see them winning bets they prepared in Hockey game and you don't understand how they work, you will be the liquidity the casino is losing to winners.
There was a time I on NGN timeline saw a couple of guys were winning basketball games, I don't know much about basket ball then and then I decide to follow their lead, I was losing money and losing game while this guys where really winning. I later found out that I was playing NCAA basket ball while they were playing NBA games. That was how I knew I was dumb and knows nothing about basket ball, it took me another time to later understand how to play basket bets.