None of the world's twenty largest blockchains has fully deployed quantum-resistant cryptography, leaving $2.5 trillion in combined market value exposed to future attacks, according to analysis of qLABS Research data published by TechGaged.
The exposure is unevenly distributed. Just over $1.67 trillion sits on blockchains that acknowledge quantum risk but have not committed to a migration path: Bitcoin, TRON, Dogecoin, Monero and Canton all fall into this category. Bitcoin alone accounts for roughly $1.6 trillion, around 71 percent of top-20 layer-one market capitalisation, and currently has no formal quantum migration plan beyond proposals circulating among key stakeholders.
Another $122.7 billion is held on chains that have no public quantum security plan at all. BNB Chain, the largest in that group, carries $87.3 billion. Hyperliquid, valued at $10.3 billion, is the only major network with no visible quantum preparation of any kind — no roadmap, no public acknowledgement, no broader stakeholder discussion.
Eight networks are actively developing quantum-resistant security: Ethereum, XRP, Solana, Cardano, Zcash, Bitcoin Cash, Sui and Hedera hold a combined $456.5 billion. Cardano leads on readiness, backed by years of formal research and a defined long-term strategy. Ethereum and XRP follow; XRP has set a target of full quantum readiness by 2028, while Solana published its first public quantum roadmap last month. None of the eight is fully quantum-secure yet.
The worrying part is that quantum computing seems to be evolving faster than the crypto industry can adapt. Even the most prepared blockchains still haven't fully rolled out quantum-resistant protection.
The dataset covers the top 20 blockchains by market capitalisation as of Q2 2026. Across that cohort, only $456.5 billion — about one-fifth of the total — sits on networks with active quantum protection programmes underway.
