Apart from losing money gamblers experience other mishaps that makes them regret and one of these is, missing out on an opportunity that they should have taken advantage of. Casino games can be very funny and unpredictable, you can't actually tell if you are going to win or lose in a particular round. They get hesitant about staking on particular round and later end up regretting because they missed it.
That part though should not be something worth regretting. It happens all the time in casino games, most especially slots. You place bets on a round then it crash but then you tell your self to wait and not bet the next and unfortunately you see that the round goes very far before crashing. It's painful though but just know that the algorithm is just messing with your head. Most times wat I do it to place smaller nets on every round and play continuously till I'm satisfied. That way I don't regret missing any round.