I have tried some other games like sport bet and other Casino but it wasn't really easy for me because it was lost lost all through, but when I started playing Dice, I study the pattern and it was working for me and I could double my capital within 30 minutes.
What pattern? As far as I know, Dice has no specific pattern. It mostly relies on the luck. So, it is quite impossible to know the pattern. 
By the way, you claimed Dice is easy to make money. Could you tell me how many times you win the Dice? Unless you already won it many times, I assume you won it because you were luck at that time. However, there is no guarantee that you will win it again in the next attempts. IMO, sport betting looks easier than Dice, we still can make analysis based on some factors in the sports fields (such as players, stats, tactics, etc).
Sport betting may gives you the other winning but that will only if you can have better prediction and pick the right team. But because we are in the gambling world, luck still be needed to win and we can not wins easily or many times from one or two gambling games. That is because of our luck.