More than 50% of the world population gamble in one sport or the other and some are making good money while some are still hoping and praying for their luck to shine.
It will not be easy to get the accurate number of gamblers in the world. But most of the statistics online pointed out that 26% of the world's population has gambled.
No doubt some people are making money from gambling but the population is few. Only a few people are lucky enough to hit the jackpot. The number of people who have experienced long losing streaks is far higher than people who have won big.
It is better not to see gambling as a source of income because the outcomes are unpredictable.