If I remember correctly, my worst moment in Gambling is around 3-4 years ago. I gambled my money and I am feeling that I am winning although there are some losses, my wins are more than losses. I didn't stop playing until I lost 2 straight times. I said to myself "I need to get my lost money back". Then the losing streak strikes. I lost many times already until I lost all of my money. I felt regret because I became greedy at that time hoping that my money will grow as I play with that. Now I don't gamble too much now.
This is the biggest blunder that most of the gamblers commit when they are playing gambling and wining. The keep on playing in order to make more money than they have earned and due to this greed, they soon start losing the games because as the time passes, the gambler start losing his concentration in gambling because it is in human nature that he soon gets bored of things.