The Ethereum Name Service's job is to map human-readable names like Sigel.eth to machine-readable identifiers such as Ethereum addresses, other cryptocurrency addresses, content hashes and metadata.ENS users can use the NFT to store all of their crypto addresses, and to receive any cryptocurrency or NFTs to their ENS smart contract.NFT platform OpenSea already supports secondary ENS transactions, reporting 7-day ENS domain volume of $1.7M.