As the saying goes ''bet on what you can afford to lose''. The same thing goes for investment. If you always have that at the back of your mind, you're good to go at betting.
There will be a time you'll lose and also time to win. Depending on how luck shines on you that day. But once you notice luck is against you for that day, it would be advisable to withdraw immediately to avoid more losses and try again, some other day.
I have lost the winnings of the week in an hour on my unlucky day but that slot has not been generous too. In total, I have made more than 2000 spin but the bonus features never arrived in-game, unfortunately. After that day, I never try to revenge gamble because it will take back all winnings on the loss series. Sometimes, it is possible to make mistakes for pro gamblers and it can happen any day. Just my 2 cents.