Very nice look and quality.
A lot of talent here. I also do like the idea of doing something with the O in Coin.
I am not sure on the acceptability of using a square image in place of the O for branding. I'll ask a branding consultant friend of mine about that who will help me choose a winner, or if you know of anyone who already uses a square image in the place of an O in a brand logo, let me know. I do want the brand in whatever capacity the image may be used in to automatically reflect a gambling dice site, and I think having a dice has to be involved, though the Bitcoin $ sign does seem interesting from a Bitcoin perspective, but lacks the obvious from afar look that it's a gambling dice site.