Vitalik Buterin says quantum computers could become a serious crypto security risk as early as 2028, with a roughly 20% chance of breaking current cryptography before 2030. Ethereum is studying post-quantum options, while Bitcoin faces a slower upgrade path.

Bitcoin rose 2.5% to $68,919.84 as Ethereum gained 4.5%, XRP 3.4%, and Dogecoin 3.1%. Altcoins like STO surged 85%, OM 32%, and BLUR 32%, signaling broad market strength.

Google’s latest quantum computing update pushed traders toward post-quantum crypto narratives, sending QRL and CEL up 50% while the 20-token sector climbed to a $4.66 billion market cap.

Privacy coins rallied on May 21 as traders moved into tokens tied to privacy features and quantum-resistant design. Zcash rose about 7%, while QRL jumped 25%.

IOSG argues that quantum computing is not a doomsday button for cryptocurrencies, but it does pose a serious long-term threat to the cryptographic foundations of Web3. In a reposted article by 0xjacobzhao, the firm says the real danger is not that blockchains suddenly stop working, but that a cryptographically capable fault-tolerant quantum computer could derive private keys from already exposed public keys and produce valid signatures on-chain. That would put extreme pressure on three core properties of public blockchains: permanently public ledgers, irreversible asset transfers, and self-custodied private keys. The article says the industry’s problem is no longer a lack of post-quantum cryptography. Instead, the hard part is coordination. Bitcoin and Ethereum face different migration problems: Bitcoin must deal with exposed legacy UTXOs, signature-size expansion, and governance disputes over dormant coins, while Ethereum is working on a broader migration across accounts, validator signatures, data availability, and zero-knowledge systems. IOSG points to a 5 to 8 year “engineering comfort window” before quantum risk becomes much harder to manage, even though broader Q-Day estimates remain centered around 2035 to 2045, with faster scenarios falling in the 2030 to 2035 range.

On Dec. 10, crypto market saw a sharp correction. XRP dropped 14% weekly, ADA led top 10 with 19% loss. Over $1.5B liquidations. BNB gained 8%.

QRL is a blockchain project focused on post-quantum security, using XMSS instead of ECDSA. Its mainnet launched in June 2018. Circulating supply stands at 70,941,734 QRL, with a max supply of 105,000,000 and an all-time high price of 4.17.

Quantum Resistant Ledger (QRL) is the world's first fully post-quantum secure blockchain, using XMSS signatures to counter quantum threats. This article covers its tech, supply data, and storage options.