$SIGN is a cryptocurrency typically linked to projects focused on digital signatures, identity verification, and secure data authentication on the blockchain. These platforms aim to replace traditional trust systems—such as paperwork, centralized verification authorities, and manual approvals—with cryptographic proofs that are transparent, tamper-proof, and decentralized.

In many cases, $SIGN is part of a broader protocol designed to enable users, developers, and organizations to create verifiable claims on-chain. This aligns with the broader vision of Web3, where users control their own data and identity.