Web3 domain names are blockchain-based DNS addresses that allow users to create and manage their own personalized domains. They are also addresses which are representing users' wallets. The decentralized crypto domain names are NFTs that users can trade on NFT marketplaces. If the projects where you earn those web 3 are real and they have better marketing strategy it can earn you something huge in future, thou the NFT era is no longer being hype the way they were as of when it was first introduced