I can't believe that fice games gave you profit ever since 2015, I have lost many times doing dice games and it is really the worst that happened to me, don't need a skill, you just depend on your luck. I think it is better to do sports betting than doing dice games, atleast you know that you have a possibility to win, right?
Dice games are games that are 100% dependent on luck. So if there is a gambler who makes a profit, it means he has good luck. If he does make a profit since 2015, then he is more lucky than unlucky. I'm sure he does not keep winning, there's also a time he lost, but maybe luck more often to him.
I think it's not 100% dependent of luck, maybe few percentage of skills and bankroll is important too. With a big bankroll you have more chances to make profit before a loss streak comes, and depending how you play you can make more profit too.
Dice is a good gambling game, roulette is good too, another games are too risky for as I don't know how to play them.
Your skill and bankroll has nothing to do with the result of the roll in dice. It will just determine how long you will last on playing gambling or how much you can afford to lose. Dice depends in an internal settings so it won't be affected by outside factor. And whenever you roll the chance of winning is always the same because, if the game is provably fair, rolls are independent from each other meaning they are all random.