Users collect and breed adorable kittens, each kitten has a unique genome that defines its appearance and traits. Players can breed their kittens to create new furry friends and unlock rare cattributes. It is one of the first blockchain games in the world. While CryptoKitties is not a digital currency, it offers the same security: each CryptoKitty is one of a kind and 100% user-owned. It cannot be replicated, removed, or destroyed.