Run/make a dice site isn't easy, especially if you want get profit from it for long time. At least there are few things you must have on your dice site :
1. Security - Small bugs could empty your wallet, let users always win or crashed everything
2. Design - Without good design, people won't even try your site
3. Bankroll - People won't be satisfied if they can't bet huge amount of bitcoin
4. Fairness - Show how your provably works very well, otherwise people won't believe you
5. Advertising - No promotion, no customer
6. Customer Service - Slow/bad response could make user call you are scammer
7. Uniqueness - People got bored with many similar dice sites, so with uniqueness, people might try your site
If you can't fulfill those, i'm sure you can't run a dice sites well.
After this u can close this topic, start to work on first, second, third... and in if u come to 7 u will have nice site and i will be one of people playing there for sure.
In this world with good idea u can make a lot of money, just u need to believe in yourself, invest some money and energy.
There is a lot of threads here about gambling sites, many many comments. U need to look and to find what people like and in what people enjoy, that will help u when u start to think about look, and about other things on site.
Good luck with your project.