I would suggest that never play dice game because it consume your time, money, and effort rather invest it to the who is trusted of the crowd. Never play that game and made any profits there. My opinion is that try to invest it.
I hope it is as easy as that. People have different kind of interest. And people who are more incline in gambling will certainly not listen to you. Furtheremore, if you suggest a gambler to invest his money, you are just telling him to enter a new domain of several unknown entities to that person. Unless you will guide him all through out, it is better for him to stay in gambling where he knows the left and right of the scenario and can easily make a profit than that investment you are saying.