Sometimes, it's not really the depression and addiction to gambling that pushes them to want to commit suicide, it's pressure, pressure from people they are oweing money and all that.
This part, I forgot to mention this as some special case. Pressure is indeed one of the main culprit why some people choose to end their life because they can’t handle the criticism by others.
I read some cases that involves student that use his tuition fee or borrow money to a friend and lose it all.