In the distant crypto-past of 2018, an innovative project made it possible for NFTs to own other NFTs. The folks from KittyHats, purveyors of accessories for the CryptoKitties, and DADA, the collaborative art platform and creator of NFTs since 2017, got together to make sure that CryptoKitties could also collect art. https://powerdada.medium.com/cryptokitties-collect-cryptoart-925b2b01879eYes, cats can own NFTsBut how can one NFT own another NFT? The innovation is that instead of the contract...