If you want to gamble and have the lowest chance of failing then play dice on a site with the lowest house edge.
In any gambling game you can't get lower odds to lose than that.
Lower odds doesnt guarantee you will win some profit though because there is house edge which mean, you will end up losing too in the end or may be in early bet. Let say that they using 1 btc and play on lower odds like 1.1 or even lower. Sometimes if you win, you can double the amount of your balance or even more but do you calculate when you loss? You will need to win 10 times again to recover you 1 times loss. 10 to 1 is pretty good number too and it is not that easy