As Bitcoin (BTC) struggles to reclaim its footing after a 46% slide from its October 2025 highs, a debate is raging about the market finally pricing in the “Quantum Apocalypse,” looking toward Ethereum.
Prominent Bitcoin developer Matt Corallo recently pushed back against this theory during an appearance on the Unchained podcast with Laura Shin on February 19, 2026. Corallo argues that the “quantum fear” narrative is largely a scapegoat for lackluster price performance, pointing to the rest of the crypto market as proof.
The “Ether Flat” Counter-Argument
Corallo’s logic is simple: if the market were truly panicked about Bitcoin’s specific cryptographic vulnerabilities to quantum computers, capital would be fleeing into more “quantum-ready” assets.
“If [quantum risk] were true, then Ethereum would be up substantially on Bitcoin,” Corallo noted.
Instead, Ethereum (ETH) has mirrored—and even exceeded—Bitcoin’s pain, trading around $1,957 and down roughly 58% since the market peak in October. To Corallo, this proves the current sell-off is a broad “risk-off” event rather than a targeted rejection of Bitcoin’s security model.
A Different Kind of Competition: BTC vs. AI
If not quantum fears, what is driving the decline?
Corallo suggests that Bitcoin is facing a new, massive competitor for institutional capital: Artificial Intelligence.
- Capital Intensity: AI infrastructure is incredibly expensive. Large funds that once saw Bitcoin as the “only” high-growth tech play are now diverting billions into AI hardware and research.
- Value Accrual: Investors are increasingly looking at traditional equities tied to AI as a way to capture the next wave of technological growth, leaving Bitcoin “competing for capital” in a way it never has before.
The Counterview: Is the Risk Underestimated?
Not everyone agrees with Corallo’s dismissive stance. At the LONGITUDE event on February 12, 2026, Charles Edwards, founder of Capriole Investments, argued that until Bitcoin has a clear upgrade path, the risk must be priced in.
- The Discount Factor: Edwards believes investors must start “discounting” Bitcoin’s value until the network becomes quantum-resistant, warning that if a fix isn’t deployed by 2028, BTC could fall below $50,000.
- Institutional Warnings: Even BlackRock has officially recognized the threat. In early 2026, the world’s largest asset manager updated its iShares Bitcoin ETF (IBIT) registration to warn investors that quantum advances could compromise the integrity of the network.
The State of Quantum Readiness
While Bitcoin developers are accused of moving slowly, the Ethereum Foundation has been more vocal about its “post-quantum readiness.” On February 18, 2026, the Foundation included quantum security as a core pillar of its “Harden the L1” track in its 2026 protocol priorities.
|
Expert / Entity |
Stance on Quantum Risk |
Current Market Outlook |
|
Matt Corallo |
Long-term risk, but not a short-term price driver. | Blames competition with AI for capital. |
|
Charles Edwards |
Existential threat that must be priced in now. | Bearish unless a “fix” is deployed by 2026-28. |
|
Ethereum Foundation |
High priority; actively building PQ-readiness. | Focusing on native account abstraction as a bridge. |
|
Kevin O’Leary |
Minimal threat; quantum power is too expensive to use on BTC. | Prefers quantum use in medical research. |
While most experts agree a “Quantum Apocalypse” is years away, the integration of BIP 360 signals that the network is officially “checking the exits.”
1. BIP 360: The “P2MR” Soft Fork
Merged into the official Bitcoin BIP repository in February 2026, BIP 360 is the first concrete step toward a quantum-resistant Bitcoin.
- What it does: It introduces Pay-to-Merkle-Root (P2MR). This is a modification of the 2021 Taproot upgrade.
- The Fix: Current Taproot addresses (P2TR) have a “key-path” that exposes a public key on the blockchain. BIP 360 removes this exposed key path, essentially hiding the public key behind a hash until the moment of spending.
- Status: It is currently a draft under review for a potential soft fork activation later this year or in 2027.
2. The “QuBit” Series & Post-Quantum Signatures
Beyond BIP 360, developers are discussing a series of proposals informally known as the “QuBit” soft fork. These are designed to swap out the current ECDSA/Schnorr signatures for Post-Quantum Cryptography (PQC).
- Candidates: Developers are evaluating Lamport signatures and Winternitz OTS (WOTS). While these are “one-time” signatures (you can’t reuse addresses), they are mathematically resistant to Shor’s algorithm.
- Challenges: The primary hurdle is block space. Quantum-resistant signatures are significantly larger than current ones (kilobytes vs. bytes), which could slow the network or require a “weight” adjustment in how transaction fees are calculated.
3. Recovery Schemes: “Commit-Delay-Reveal”
One of the most innovative proposals being discussed in early 2026 involves a way to rescue “lost” or “stale” coins that were never moved to a quantum-resistant format.
- The Plan: A user would “commit” to a new quantum-resistant address by publishing a hash of their old public key and a new quantum key.
- The Delay: After a mandatory waiting period (e.g., 6 months), the funds move. This “slow defense” ensures that if a quantum attacker tried to steal the coins, the original owner has a window to prove ownership and recover them.
The Final Verdict
The narrative that Bitcoin is failing due to “quantum fear” is a significant oversimplification. While proposals like BIP 360 (P2MR) prove that developers are taking future threats seriously, the actual sell-off is much more likely a result of institutional rebalancing. For the first time, Bitcoin is competing with a high-growth, capital-intensive asset class in Artificial Intelligence. Large funds are no longer just “buying crypto”; they are choosing between a decentralized store of value and the infrastructure of the AI revolution.
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