http://www.telegraph.co.uk/men/active/mens-health/10976770/Online-gambling-how-I-lost-my-wife-children-and-750000.html
And this guy started with almost nothing and made almost $500,000 gambling with Bitcoin, then he lost it all in about 60 seconds. https://www.reddit.com/r/IAmA/comments/1ch7wb/
So pretty simple question, how much can YOU lose with gambling?
It depends on your self tolerance in gambling,
You can't actually compute how much can you lose, especially if you are an avid gambling player.
If you want to regulate your money and want to know every penny that comes out of your pocket, then it is recommended that you set an amount to put at stake every week or month.
In that way you can compute how much you can lose.