Crypto News
Glassnode's latest on-chain research puts roughly 6.04 million BTC — about 30% of circulating supply — at theoretical risk from quantum attacks, with an estimated dollar exposure near $469 billion at current prices. The figure breaks into 1.92 million BTC in structural exposure (legacy pay-to-public-key outputs, early Satoshi-era coins and Taproot outputs) and 4.12 million BTC in operational exposure driven by address reuse. The mechanism is Shor's algorithm, which could in theory derive a private key from a public key already exposed on-chain, making those UTXOs targetable without a new transaction.
Why it matters
The structural cohort is largely immovable — many of those early coins are believed to be lost or dormant — which limits the real-world attack surface. The operational cohort is a different story: 4.12 million BTC sitting in reused addresses is both large and, in principle, avoidable. A network-wide migration to post-quantum signature schemes would blunt the risk, but coordination across holders, miners and core developers is non-trivial. For now the quantum narrative is a latent overhang on price, not an active catalyst — but it is a narrative that becomes louder every time BTC stalls below all-time highs.
Market impact
Glassnode's read is that BTC demand is not collapsing, but the floor is not yet confirmed. Price is compressed between resistance at $78,000 and layered support at $74,000 and $80,000, with ETF inflows flagged as the most important variable for direction. On-chain analyst Willy Woo said BTC is "currently attempting a bottom" and pointed to the next three to six weeks as the decisive window. Middle East tensions and US macro data remain live catalysts that could invalidate any technical setup overnight — and a quantum-driven panic into that compression zone is the tail risk bulls do not want to test.
Frequently asked questions
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How much BTC is exposed to quantum risk according to Glassnode?
Glassnode identified 6.04 million BTC — about 30% of circulating supply — as theoretically exposed to quantum attacks, with an estimated dollar exposure near $469 billion at current prices.
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What is the difference between structural and operational quantum exposure?
Structural exposure covers 1.92 million BTC in legacy pay-to-public-key outputs, early Satoshi-era coins and Taproot outputs, most of which are believed to be immovable. Operational exposure covers 4.12 million BTC sitting in reused addresses, which is in principle avoidable through wallet migration.
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How would a quantum attack actually compromise BTC?
Shor's algorithm could, in theory, derive a private key from a public key already exposed on-chain. That would make any coin with an exposed public key targetable without requiring a new transaction to be signed.
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Why is this a bearish signal for BTC right now?
The 4.12 million BTC of operational exposure is both large and avoidable in theory, but a network-wide migration to post-quantic signatures requires coordination across holders, miners and core developers. The narrative becomes louder every time BTC stalls below all-time highs, and it hangs over the current bottom…
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What is the most important catalyst for BTC price near term?
Glassnode flagged ETF inflows as the most important variable for direction. On-chain analyst Willy Woo said BTC is "currently attempting a bottom" and pointed to the next three to six weeks as the decisive window, with Middle East tensions and US macro data as live downside catalysts.
CoinDesk
Lookonchain
CoinTelegraph
Glassnode
WatcherGuru
Benjamin Cowen