The first NFT was CryptoKitty in 2017, which were created as individual ERC-721 tokens and allowed collectors to create and trade virtual cats. Another very early NFT project was CryptoPunks which also started in 2017, as a collection of 10,000 fun character on Ethereum blockchain. CyberPunks made the ERC-721 token standard for digital art in the NFT industry. Sales now exceed $454M by the middle of 2021, with individual sales for a Punk, exceeding $7.57M in 2021, for Punk #7804.