Someone can win from Dice game because of the luck. We know that dice is one of gambling games based on luck so he should have his luck to double his capital. But I am not sure if he can repeat his winning in the next rounds or other days because he still depends on his luck. Even if he say he gets the pattern, that doesn't mean he can win for more.
Indeed. Dice is a part of luck-based games. Sure, there is a very small chance to win Dice in a row because it just relies on the luck. Even if he can win again in the next attempt, he may begin to lose in the next 2 or 3 attempts. TBH, I don't see any pattern that we can learn from Dice. It is not like the skill-based games. It is purely about luck, I think he is not serious to say "studying pattern".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.
Of course, we only can win betting if we choose the better/right team. 
I don't say the luck has no role in betting but it is not purely the same as in Dice. I'm sure the role of the luck is smaller in betting, analysis will have a bigger role. Especially in sports betting, we should analyze the current performance of the teams (stats), condition of the players, the possibility of the tactics to use, and some other things. So, we don't totally rely on the luck in betting because we should analyze some factors.