Decentralized digital identity is still in the early stages, but the combinability of technologies in Web3 and the flywheel effect of crypto finance will accelerate this process. The paradigm transfer of “address + private key” accounts is the first step in the development of Web3 digital identities. With the rise of the SBT concept, is it possible to build a digital portrait of users in the digital space and give them a unique and exclusive digital identity?