The investment manager Ark Invest released a revealing technical report this Wednesday. According to the official report by Ark and Unchained, approximately 34.6 percent of the Bitcoin supply remains vulnerable to future quantum computing advances. This figure represents nearly 6.7 million BTC requiring a technical migration to ensure safety against the quantum risk of Bitcoin.
The detailed analysis specifies that this volume includes nearly five million digital coins. According to the statistical data collected, these assets are exposed due to address reuse practices that unnecessarily reveal their public keys to the outside. Furthermore, about 1.7 million BTC reside in old P2PK formats that lock funds directly to the keys, representing a critical historical vulnerability.
A horizon of technical obsolescence for Satoshi’s inactive supply
To compromise current security, a quantum system with extraordinary capabilities beyond contemporary reach would be required. Researchers estimate that 2,330 logical qubits and millions of quantum gates would be necessary for effective network decryption. Consequently, it is imperative to break the mainnet’s elliptic curve cryptography before malicious actors achieve these specific computational milestones in the coming years.
This perspective offers a critical differentiation compared to other industry reports recently published. While CoinShares estimated a marginal risk of 0.05 percent, Ark identifies a massive theoretical exposure of legacy addresses in its research. This divergence highlights the importance of considering the unknown facing the crypto ecosystem regarding the real magnitude of the external threat.
The risk progression is divided into five evolutionary stages clearly defined by analysts. Real danger will begin at stage three, projected for the mid-2030s, according to the companies leading the development of quantum systems for commercial use. Until then, the network has a time window to implement protocols that protect digital assets that remain stationary in obsolete wallets at this moment.
Another determining factor is the physical infrastructure being built in global technology hubs. Chicago will host the first facility with one million physical qubits in 2027, partially funded by BlackRock-linked entities. Given that this breakthrough could accelerate timelines, it is vital to monitor the progress of quantum computing as a fundamental risk metric for institutional self-custody.
How will the Bitcoin core face the transition toward post-quantum cryptography?
The proposed technical solution requires integrating post-quantum cryptography algorithms into the asset’s base protocol. Proposals such as BIP-360 seek to reduce long-term exposure without adding digital signatures immediately to the existing structure. Nevertheless, it is essential to design an address format secure against brute force attacks to prevent obsolescence from affecting global market confidence.
Despite theoretical advances, implementation faces quite significant governance challenges for the community. Achieving a decentralized governance consensus to execute a soft fork requires massive coordination between miners and developers. Therefore, quantum-proof wallets represent a necessary advancement, even if some critics view them merely as an early prevention measure.
The path toward the technological resilience of the blockchain will depend on the constant monitoring of external developments. It is vital to watch the evolution of PsiQuantum and its 2027 milestones as the first real warning indicator for developers. The community must balance security with code simplicity, ensuring that the network evolves without sacrificing its inherent immutability.
The next milestone to observe will be the technical discussion on the ML-DSA signature scheme in the core developers’ mailing lists.
