Analyst: Quantum Computers Will Break Bitcoin Politics, Unleashing Flood of Lost Coins

Analyst Warns Bitcoin's Dormant Supply Faces Highest Risk in Quantum Era

James Check, founder of Checkonchain, recently stated that Bitcoin faces a significant consensus challenge that could ultimately determine the fate of millions of coins that have remained untouched for years. The arrival of powerful quantum computers could trigger one of the most disruptive moments in Bitcoin's history, not primarily because of the technology itself, but because of the political gridlock surrounding how the network responds to this emerging threat.

In a post on X, Check argued that there is "no chance" the Bitcoin community will reach an agreement to freeze coins that are not migrated to quantum-resistant addresses. He emphasized that development politics and the network's decentralized governance structure make rapid coordination nearly impossible, leaving old coins vulnerable to potential quantum attacks. This political dimension adds a layer of complexity that extends beyond purely technical considerations.

According to BitBo data, 32.4% of all Bitcoin has not moved in the past five years, while 16.8% has remained dormant for more than a decade. How much of this supply is lost, inaccessible, or simply being held long-term remains unresolved. However, Check warned that these unmoved coins would be the first targets if quantum computers crack Bitcoin's current signature schemes. The sheer volume of dormant Bitcoin represents a significant security concern as quantum computing technology advances.

Check's comments were made in response to Delphi Digital's Ceteris Paribus, who noted that Bitcoin's quantum problem is "not technological" and that post-quantum versions of Bitcoin will be feasible. The unresolved issue, he said, is what happens to the vast reserves kept in non-quantum-resistant formats. This distinction highlights that while technical solutions exist, the real challenge lies in achieving community consensus and implementing changes across the decentralized network.

Bitcoin currently relies on elliptic curve cryptography via ECDSA and Schnorr signatures, both of which are vulnerable to Shor's algorithm once a sufficiently advanced quantum machine is built. While the U.S. National Institute of Standards and Technology has already approved several quantum-resistant signature schemes, including those referenced in Bitcoin Improvement Proposal 360, adopting such standards requires community-wide agreement. The transition to quantum-resistant cryptography represents a significant technical and political challenge for the Bitcoin ecosystem.

The underlying threat has been a point of growing discussion across the industry, fueled by concerns that emerging quantum hardware could rapidly narrow the timeline for a workable quantum attack. Quantum machines today have roughly 1,000 physical qubits, but major technology firms, including IBM, Microsoft, Amazon, and Google, have announced initiatives intended to reach hundreds of thousands or even millions of qubits within the next decade. This rapid advancement in quantum computing capabilities has intensified the urgency of addressing Bitcoin's quantum vulnerability.

Governments and Institutions Adjust Strategies as Quantum Threat Warnings Grow

Some researchers now estimate that specialized machines with around 126,000 physical qubits could break the elliptic curve signatures that secure Bitcoin wallets. Others project that around 2,300 logical qubits could be enough to break Bitcoin's encryption, potentially placing a workable attack window within the late 2020s or early 2030s. These varying estimates reflect the uncertainty surrounding quantum computing development timelines, but they all point to a relatively near-term threat that requires proactive measures.

Cybersecurity specialists warn that adversaries may already be preparing for future breakthroughs using "harvest now, decrypt later" strategies, collecting data from public blockchains today in anticipation of later quantum advances. Naoris Protocol CEO David Carvalho said this risk makes older address formats especially vulnerable, noting that roughly 6–7 million BTC are stored in address types that expose public keys directly. This represents a significant portion of Bitcoin's total supply that could be at immediate risk once quantum computers become sufficiently powerful.

Some governments and institutions have begun adjusting their practices in response to these warnings. In September, El Salvador split its 6,284 BTC national reserve across 14 addresses to reduce exposure to potential quantum attacks. This move demonstrates a growing awareness among sovereign entities of the quantum threat and represents a practical step toward risk mitigation. Major financial firms have also acknowledged the risk, with institutional recognition of quantum threats becoming increasingly common.

Major financial institutions have begun incorporating quantum risk assessments into their cryptocurrency strategies. A prominent asset management firm mentioned quantum threats in Bitcoin ETF filings, and Tether CEO Paolo Ardoino recently cautioned about long-inactive wallets. These acknowledgments from mainstream financial players underscore the seriousness with which the industry is treating the quantum computing threat.

Despite the growing concerns, not all experts believe the threat is imminent. Blockstream CEO Adam Back stated in a recent statement that quantum attacks are unlikely for at least two to four decades, arguing that today's machines are far too noisy and require heavy error correction. He pointed out that Bitcoin could adopt post-quantum standards long before a machine capable of breaking SHA-256 becomes viable. This more optimistic view suggests that the Bitcoin community has sufficient time to implement necessary upgrades.

The debate mirrors a broad divide in the industry over how quickly Bitcoin must act. Solana co-founder Anatoly Yakovenko has urged the community to accelerate its quantum-resistant roadmap, warning in recent months that AI-driven research could cut expected timelines in half. Former Ethereum contributor John Lilic has likewise predicted that quantum threats may become meaningful before the end of the decade. These differing perspectives highlight the challenge of building consensus around the urgency and timing of quantum-resistant upgrades.

The political and governance challenges surrounding Bitcoin's quantum transition represent perhaps the most significant obstacle to securing the network against future quantum attacks. While technical solutions exist and continue to evolve, the decentralized nature of Bitcoin's governance means that implementing network-wide changes requires unprecedented coordination and consensus-building. The fate of millions of dormant coins may ultimately depend not on technological capability, but on the Bitcoin community's ability to navigate these complex political dynamics and reach agreement on a path forward.

FAQ

How do quantum computers threaten Bitcoin's security?

Quantum computers could break Bitcoin's ECDSA encryption, enabling attackers to derive private keys from public keys and steal funds. However, Bitcoin can upgrade to quantum-resistant algorithms before this becomes viable, protecting the network.

How long will it take for quantum computers to break Bitcoin? When will it become a real threat?

Current quantum technology remains decades away from threatening Bitcoin. Experts estimate 10-15 years minimum before quantum computers could pose cryptographic risks. Bitcoin's network is actively developing quantum-resistant upgrades. The threat remains theoretical rather than imminent.

If quantum computers break Bitcoin, how would those lost coins flow into the market and what impact would it have on price?

Lost coins unlocked by quantum breakthroughs would flood supply, causing massive price pressure downward. The sudden influx of dormant Bitcoin entering circulation could trigger panic selling and market collapse, potentially reducing Bitcoin's value by 50-80% as confidence erodes and liquidity overwhelms demand.

How does the Bitcoin and blockchain community address the threat of quantum computers?

The community is developing quantum-resistant cryptography and post-quantum algorithms. Bitcoin may implement hash-based signatures and upgraded protocols to protect against quantum attacks. Research into quantum-safe solutions continues actively within blockchain development.

Which cryptocurrencies are already developing post-quantum cryptography protection?

Bitcoin, Ethereum, and several projects like NIST-standardized lattice-based systems are exploring quantum-resistant solutions. Projects such as Quantum Resistant Ledger (QRL) and others are actively implementing post-quantum cryptographic algorithms to prepare for future quantum computing threats.

Do quantum computers pose the same level of threat to other cryptocurrencies?

No. Quantum threats vary by cryptocurrency. Bitcoin and Ethereum face similar risks due to ECDSA vulnerabilities, but coins using different cryptographic methods like lattice-based algorithms offer greater resistance. Post-quantum migration timelines differ significantly across blockchain projects.