This comprehensive guide explores AltLayer (ALT), a decentralized protocol revolutionizing Layer 2 scalability through innovative restaking mechanisms. Launched in 2024, AltLayer addresses security and interoperability challenges across multiple rollup stacks including OP Stack, Arbitrum Orbit, Polygon CDK, and ZK Stack. The protocol enhances rollup infrastructure by providing crypto-economic fast finality, decentralized validation, and cross-chain capabilities without central control. With over 73,000 holders and active listings on Gate and other major exchanges, AltLayer demonstrates strong ecosystem adoption. This article covers its technical architecture, market performance metrics, strategic partnerships, and practical participation methods. Whether you're exploring blockchain scaling solutions or evaluating Layer 2 infrastructure investments, AltLayer represents a significant development in decentralized rollup innovation and deserves attention in the evolving cryptocurrency landscape.