A "Coin Moon" is an idea of a collectible game Non-Fungible Token...

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Not an Ancient Silver Roman Denarius Coin from Rome, 137 A.D. Crescent Moon with Stars coin

But a digital coin (or token) on the STEEM blockchain that is uniquely numbered and optionally filled with other STEEM tokens!

A "Coin Moon" is a thought of a token with some mixture of properties related to Coins and Moons perhaps to a particular day when coins are related in price, or volume and a coin is created with that ratio and collectible and possibly with "backed" value with the "coins" inside that may be "redeemed" by burning the token. Burning the tokens would in turn create a value redemption and increase scarcity of the remaining tokens.

Have some ideas of a "Coin Moon" collectible game where packs of them may be collected and open to get Moons that have coins in them that may be collected from varying rarities. Rarer ones could have tokens of STEEM, Steem backed dollars, bitcoin, litecoin for example in the Steem Engine flavors. These could be traded on the market or withdrawn for the native coins.

Artwork could be used and generated from the STEEM community. Artists could submit their coin and moon artwork which could then be voted on and winners could receive their artwork tokens in the game as a reward as well as being part of the game with their creation. Still lots to think through and test out.

These tokens could in turn be a "hunt" for the coins inside of the different rarity tokens. Rarer NFT's (Non-Funglible Tokens) could have a higher "reward" of tokens inside of them. These could be burned to get the tokens inside or kept, collected and traded. Some mixture of tokens from the various communities could be included a well. Shall see where the ideas may lead and what may be co-created together.