Could be in any context. I do it a little on UFC fights but that’s a relatively low amount and I can afford I to lose any time I do. It seems like it’s becoming a really wide spread problem though, at least in the US. At the same time I don’t see why it should be illegal. Granted I also don’t think any drug should be illegal.
Just remember that it doesn’t matter if you have an addiction or not, the reason gambling establishments are as affordable or attractive as they are is because there are people feeding their entire life savings/retirement into them right now destroying their lives. They can afford for you to get that fun occasional win as long as the addicted keep them propped up.