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it is really normal when you gamble and lost money, you can't expect you can be rich though gambling.
And I lost some money on gambling site, but not too much, I gamble only for fun.
It's normal when you gambling on a long run, you'll eventually lose.
The only one that make profits it just luck. Only made bets with high multiplier and win, then stop.
Unless it's a game, like blackjack or something, depend on your skill (luck also)