I think make a unique gambling game or casino that different in any gambling casino here.. so that you can get more people to gamble in your site if you make a newly game that you can gambel and entertainment for a long time ..
Well if you want to make some gambling sites which are unique there are some requirements also, very first is your capital, it must be in a range of 1000 btc together the website and many aspects that completed as a gambling site. But as OP maybe i can suggest that you have to hire some devs that is expert with cryptocurrency and make some alts that will contribute to crypto world.