Yes, DAI is an ERC20 coin. ERC20 is a technical standard on the Ethereum blockchain that defines the rules and functionalities of tokens. DAI adheres to the ERC20 standard, which means it is fully compatible with Ethereum wallets and decentralized applications (DApps) that support ERC20 tokens. Being an ERC20 coin allows DAI to benefit from the vast ecosystem and infrastructure built around Ethereum, making it easy to integrate and interact with various platforms and services.