Privacy and post-quantum tokens rallied sharply on May 21 as investor concern over quantum-computing threats sent capital into assets touting both anonymity and resistance to future cryptographic attacks. Key moves - QRL led the surge, jumping about 25%, while Zcash (ZEC) climbed roughly 7%. Smaller privacy and post-quantum plays such as Qubitcoin and Starknet also posted gains. The total market cap for privacy coins neared $63 billion. - ZEC hit a year-to-date high of $686, lifting its market capitalization to about $11 billion — a level not seen since November 2025. Over the past month Zcash has gained more than 73%, compared with a roughly 0.2% rise in the broader crypto market, per CoinMarketCap. Why investors moved Two forces appear to be driving the rotation: heightened awareness of quantum vulnerabilities in widely used cryptography, and growing interest in protocols that combine privacy features with post-quantum defenses. A recent Glassnode report estimating that 9.6% of Bitcoin’s supply is “quantum-exposed” sharpened these concerns and pushed money toward assets whose designs explicitly address that risk. Zcash’s appeal is evolving beyond speculation. Its zero-knowledge proof tech is now a foundation for major Ethereum layer-2 networks, a structural shift that traders say underpins the token’s re-rating this year. QRL, by contrast, represents a pure play on quantum resistance: it relies on lattice-based cryptography, a family of algorithms considered more resilient against quantum attacks than Bitcoin’s elliptic curve signatures. The wider risk picture Research cited across the sector indicates breaking Bitcoin’s elliptic curve cryptography would require on the order of 2,330 logical qubits — a high bar but one that has focused attention on long-term risk. Financial institutions have taken notice: Citi analysis, reported previously, warned a successful quantum attack could threaten $2 trillion to $3.3 trillion of GDP. Market implications With relatively few liquid, proven quantum-resistant alternatives available beyond QRL, Zcash and a handful of adjacent tokens, demand has outstripped supply — helping to push up prices and premiums in this niche. For traders and infrastructure builders, the episode underscores a broader trend: investors are now pricing not only privacy and utility, but also the ability to withstand a quantum transition. Read more AI-generated news on: undefined/news