If you are talking about gambling then it can be any site because its only about like and not because of any particular site.And if its about investment in gambling site then thats a really good return.Here are some sites like crypto-games.net,fortunejack or moneypot,have you invested in one of these.
Yes try with these sites. Good sites for gambling. Will see a good return if you gamble. But if you manage to invest around 10 mbtc than betting will be good choice, there is a good chance to make profit there because I have good experience with them as well. Crypto-games is also a good option for investment.Try these sites.