Privacy and post-quantum tokens experienced a significant rally on May 21, driven by investor concerns over potential threats from quantum computing. The Quantum Resistant Ledger (QRL) led the surge with a 25% increase, while Zcash (ZEC) rose by approximately 7%, reaching a year-to-date high of $686. The total market capitalization for privacy coins approached $63 billion, with Zcash's market cap hitting $11 billion, a level last seen in November 2025. The rally was fueled by heightened awareness of quantum vulnerabilities in existing cryptographic systems and a growing interest in protocols that offer both privacy and post-quantum defenses. A Glassnode report highlighted that 9.6% of Bitcoin's supply is "quantum-exposed," prompting investors to seek assets designed to mitigate such risks. Zcash's zero-knowledge proof technology is gaining traction as a foundation for Ethereum layer-2 networks, while QRL's reliance on lattice-based cryptography positions it as a strong contender against quantum threats.