Profit depends not on the sports it depends on right bets. And you make more right bets when you know on what you bet. So the answer is short in my opinion: The most profitable sports is the one you know at most. I am more profitable in soccer for instance as I am in tennis or ice hockey because I am very familiar with soccer sports for many years.
Which sports or matches are the easiest to wager on? I know different people like different sports but which one is most or easily profitable than others? Most people stick with what they know only, like me I prefer tennis, world cup football and basketball but which ones you should bet on since they are "easy"