Bitcoin Analysis Under Quantum Shadows: Galaxy Breaks Down Real Risks and Future Defense Lines

When science fiction becomes reality, the impact of quantum computing on the encryption world is no longer just a theoretical discussion among physicists. Recently, Galaxy Digital research chief Alex Thorn made a statement that once again brings this unresolved “ultimate question” to the forefront: “The quantum threat to Bitcoin does exist, but it’s far from a life-or-death situation.” In a market mood that often swings sharply between “indifference” and “panic,” this assertion provides a calm perspective for the industry.

A Rational Clarification on the “Existential Crisis”

On March 19, 2026, Galaxy Digital research head Alex Thorn explicitly stated in an interview with CoinDesk that the threat of quantum computing to Bitcoin (BTC) is real, but describing it as an “immediate existential crisis” greatly exaggerates the actual situation.

Thorn’s view is not isolated optimism but based on a systematic assessment of current technology and the development ecosystem. He emphasizes that the risk is “recognized,” and “the most capable people are actively researching solutions.” This statement directly responds to recent community accusations that Bitcoin developers are “indifferent” or “delaying” addressing quantum risks.

From Theoretical Breakthroughs to Community Anxiety

The threat of quantum computing to Bitcoin is not new, but discussions heat up periodically with advances in quantum hardware.

• Theoretical Foundations: As early as 1994, mathematician Peter Shor proposed “Shor’s algorithm,” which theoretically proved that quantum computers could factorize integers and break cryptographic systems based on elliptic curve discrete logarithms— the foundation of Bitcoin’s ECDSA signatures.
• Hardware Evolution: In recent years, breakthroughs by Google, IBM, and the University of Science and Technology of China in qubit counts and error correction have shifted the “Q-Day” discussions from purely theoretical to near-term predictions. Some reports suggest that quantum computers capable of cracking ECDSA might appear in the mid-2030s.
• Market Response: In early 2026, the market briefly linked a $9 billion Bitcoin block trade handled by Galaxy Digital to client concerns about quantum risks, triggering a short-lived panic. Thorn quickly clarified that the trade was motivated by estate planning and profit-taking, unrelated to technological fears.

Who Is Truly on the Frontline of Quantum Attacks?

To understand the risk, it’s essential to recognize how Bitcoin’s UTXO model naturally creates a first line of defense. Not all Bitcoin holdings face the same level of risk.

Galaxy cites analysis from security firm Project Eleven, which indicates that under a “long-term exposure” definition (addresses with public keys already on-chain), about 7 million BTC could be theoretically vulnerable. At current prices, this involves roughly $470 billion in assets.

Core Risk Stratification:

Dissecting Public Opinion: The Middle Ground in Polarized Narratives

Current discussions about quantum risks have polarized into two camps, and Galaxy’s view happens to occupy the overlooked “rational middle ground.”

• Indifference Camp
  • View: Practical quantum computers are decades away; there’s no need to discuss now. Worrying now is just FUD (fear, uncertainty, doubt).
  • Flaw: Ignores the long, multi-year coordination process needed for Bitcoin’s cryptographic upgrades. Acting only when “Q-Day” is imminent may be too late.
• Doomsday Camp
  • View: Quantum threats are imminent; Bitcoin’s cryptography is vulnerable, and investors should sell immediately.
  • Flaw: Confuses “number of qubits” with “effective logical qubits needed to crack cryptography.” Current quantum computers have only a few hundred physical qubits, while breaking ECDSA requires millions of high-quality logical qubits—an enormous engineering gap.
• Galaxy’s Middle Position:
  • Acknowledges reality: The risk is real and possible, and must be taken seriously.
  • Denies urgency: There is sufficient time window to respond.
  • Emphasizes progress: Developer communities are actively working on solutions; the problem is not unsolvable.

From “Developer Inaction” to “Progress with BIP 360”

Recently, social media has circulated criticisms that “Bitcoin Core developers ignore quantum proposals.” However, Galaxy’s report reveals a different picture.

The most notable progress is BIP 360 (Bitcoin Improvement Proposal 360). Authored by Hunter Beast and others, it proposes a new output type called “Pay-to-Merkle Root” (P2MR).

• Technical Approach: Introduce P2MR via soft fork, removing internal public keys and only committing to a script tree. This means new address types are inherently quantum-resistant because they lack public keys vulnerable to Shor’s algorithm.
• Developer Feedback: Ethan Heilman, co-author of BIP 360, notes that the number of comments received on this proposal has set a record in BIP history, directly countering the “developers ignore quantum risks” narrative.

Besides introducing new address types, developers are exploring more controversial mechanisms like “Hourglass” to handle “antique” coins with exposed public keys. This mechanism envisions gradually restricting how such coins can be moved, setting a safety threshold without risking systemic hard forks.

Industry Impact Analysis: The Positive Side of Anxiety

Although labeled as “hype,” discussions around quantum computing have objectively brought positive effects to the industry:

• Accelerating Technological Development: Anxiety has sped up research into post-quantum cryptography (PQC) in blockchain. Not only Bitcoin’s BIP 360, but Ethereum Foundation has also established a post-quantum cryptography team. Competitive pressure prompts proactive preparation across the industry.
• Market Education Maturity: Investors are learning to distinguish between “physical-level risks” and “operational risks.” As Thorn said, investors shouldn’t mistake long-term technical challenges for immediate reasons to abandon Bitcoin. This discernment marks market maturity.
• Strengthening Decentralized Governance: The process of upgrading to counter quantum threats (especially soft forks) serves as a stress test and rehearsal for Bitcoin’s governance structure. Successful consensus would further demonstrate its robustness against existential crises.

Multi-Scenario Evolution: How Will Bitcoin Survive the Quantum Storm?

Based on current technological paths, we can project three scenarios for Bitcoin over the next 10-20 years:

• Scenario 1: Ordered Transition
  • Premise: Quantum development progresses steadily, but “Q-Day” remains 15-20 years away.
  • Path: Over the next 5-10 years, the community activates proposals like BIP 360 via soft forks. Wallets and exchanges gradually migrate assets to quantum-resistant addresses. Eventually, the network transitions smoothly to a post-quantum or hybrid signature era, phasing out old addresses.
  • Outcome: No major crises; Bitcoin’s security narrative is reinforced.
• Scenario 2: Race to Breakthrough
  • Premise: Quantum hardware makes an unexpected leap, shortening “Q-Day” to within 5-10 years.
  • Path: Upgrades face increased pressure. Developers must accelerate deployment of short-term patches, risking community splits (e.g., governance risks, as Mike Novogratz pointed out). Large amounts of old addresses’ funds need migration within a narrow window, possibly causing network congestion and fee spikes.
  • Outcome: Bitcoin faces severe tests but survives through intense coordination; some old coins remain locked, effectively reducing circulating supply.
• Scenario 3: Sudden Crisis
  • Premise: A nation or organization secretly develops a powerful quantum computer capable of breaking cryptography, launching an attack unexpectedly.
  • Path: Addresses with exposed public keys are compromised en masse, markets crash. However, Bitcoin can respond with emergency hard forks or client upgrades to change signature algorithms, possibly rolling back or freezing stolen transactions. This would be costly but not fatal.
  • Outcome: Short-term price collapse and loss of confidence, but protocol survives. It becomes a test of the network’s emergency response capabilities.

Conclusion

Quantum computing remains a “Damocles sword” hanging over all digital encryption systems, including Bitcoin. However, as Galaxy’s in-depth analysis shows, this sword is still some distance from our necks, and the Bitcoin community is not defenseless but actively forging its “quantum shield.”

For investors, the most rational attitude may be: stay informed but avoid panic. View quantum computing as one of many factors influencing the long-term valuation of crypto assets, not the sole determinant of their future. Throughout its history, Bitcoin has demonstrated remarkable resilience and adaptability. Facing the quantum era, it is likely to once again prove that “digital gold” can withstand even the most rigorous tests of fire.