Your right, gambling often leads to a loss of the coins, I lost some fraction of Bitcoin this way as well. The problem is even when you get lucky and you are winning you often dont stop, which then often lead to some losses which you get upset and you gonna try to win it back or even be in the profit again, but this often lead to a rage bust and loss of all of the deposited coins. Other than that I never used cloud mining sites so Im out of more Bitcoin worst decisions.