Gambling often helps to relieve stress and tension. This is a common thing . But if someone gambles to reduce stress or tension and gets a big win like op's story then it's a big gain for him and it works as a big bonus. But especially such cases are not usually seen . Sometimes it happen suddenly. And it's a matter of great luck
At least in my case that is the only reason why I gamble, most people have very difficult jobs in which they are stressed out all the time and they need a way to relax themselves and release some of that tension, and the way to release that tension is different from each person, and I find in gambling once a week a very good way to release that tension for a very low cost, after all it is not like you need to spend a fortune when you gamble, and this is especially true in the market of cryptocurrencies in which you can make very low bets.