Gambling addiction is like gaming addiction. I'm a gamer and at the same time, I'm not addicted into gambling since I can control my playing time but there are some gamers out there who are playing most of their time and not doing anything even eating or sleeping as long as they are playing and the problem is they don't realize it too. Their mind has been put into a state where their day will not be completed without playing. Same goes with gambling. They will not stop until they don't get what they want and that is profits.

Level 0:
Gamble while gamble and may forget it for months. Gamble only with friends and gambling is not an option to kill boredom.
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This is my level when I gambled but fortunately, I stopped gambling already.