Well, that may be happening if a person won huge amount but if it's not a high or decent amount then that won't really happen. In my!own experience, when I won a decent amount is that I did sleep well and the complete opposite of what you have seen in the interview. To be honest, we all have different feelings in what we experience like winning in gambling or other stuff. If a person gets overexcited then that may happen right after winning and couldn't sleep once it's time to sleep especially the one who becomes a gambling addict.
It all depends on what is running in your mind at that moment after making profits. Some, might want to gamble again believing that it's their lucky moment and wants to take advantage of it. I feel happy when I win and I sleep peacefully, due to arest of mind. Gambling shouldn't be something that will make you have a sleepless night. It's good that we practice a healthy gambling lifestyle.