I don't really know if similar question or concerns has been raised before, we often say that we are gamblers but does it mean that anyone who gambles once or twice is a gambler? If no, how long could someone be classified as a gambler or what games that are to be classified as someone gambling.
Drop your opinion.
Someone who bets money on predictions or bets money on uncertainty is basically a gambler, whether the person gambles once a week or 2-3 times a month or every day. Now a person who gambles every day and earns money or takes it as entertainment, that person is also a gambler, we may call him a professional gambler, while someone who gambles only for entertainment and gambles responsibly, we can call him a responsible gambler. But what I am talking about is that the person who gambles even for a day, we can call him a gambler at that time.
As long as the person is using money to bet on something, he is already considered as a gambler. No matter how small he is using, still, he is using money in the hope of gaining something out of it. So he may be high roller or not, but any person using some valuable item or money to bet is considered to be a gambler. And you can already see such definition. You don't need to be rich to be considered a gambler. This is why, you can find different types of gambler according to how much he can afford and what particular games they want to play with.