domain CryptoGameInc.com

The Inc would refer to incorporation.
Most cryptocurrencies are not coorporations.

CryptoGame.com was sold because it was very generic. Cryptogameinc is not 1% generic.

Now if you think companies which offer cryptogames will buy this domain, no they wont. They will have their own name like Playyaa, Gamerboy, newagegamer etc and not Cryptogame.
The only company which hold Cryptogame.com will also be not interested in your domain because there are simply too many choices.