Quantum Alliance Launches to Defend Bitcoin Amid 6.4 Million Coin Vulnerability Debate

Nine crypto companies have formed the Quantum Alliance to prepare for quantum attacks, but disagree sharply on when the threat will arrive and whether vulnerable BTC should be frozen.

Nine major cryptocurrency companies have united to form the Quantum Alliance, a collaborative effort to prepare the industry for potential quantum computing attacks that could compromise Bitcoin's security. The alliance's formation comes as researchers warn that 6.4 million bitcoin — worth approximately $525 billion at current prices — remain stored in older addresses vulnerable to future quantum decryption.

The alliance includes prominent crypto infrastructure providers, though its members remain divided on critical questions: the timeline for when quantum computers will pose a genuine threat, and whether the industry should take the controversial step of freezing vulnerable coins to protect the network. Some members believe quantum attacks could become viable within five to seven years, while others argue the threat remains decades away.

At the heart of the debate are Bitcoin addresses created using the Pay-to-Public-Key (P2PK) format, common in Bitcoin's early years and still holding coins from the Satoshi era. Unlike modern address formats, P2PK exposes the public key directly on the blockchain, making them theoretically vulnerable to quantum computers capable of deriving private keys from public keys — a task impossible for classical computers.

The 6.4 million bitcoin figure represents roughly 30% of all mined bitcoin and includes an estimated 1.1 million coins believed to belong to Bitcoin's pseudonymous creator, Satoshi Nakamoto. Most of these coins have remained untouched for over a decade, leading to speculation that their private keys may be lost forever. A quantum attack could potentially allow an adversary to move these coins, causing market chaos and undermining trust in Bitcoin's security model.

The Quantum Alliance plans to develop quantum-resistant cryptographic standards and coordinate a potential network upgrade to protect vulnerable addresses. However, the proposal to freeze or relocate coins from old addresses has sparked fierce opposition from Bitcoin purists who argue it would violate the network's core principle of immutability and censorship resistance.

One proposed solution involves setting a deadline for owners of vulnerable addresses to move their coins to quantum-resistant formats, after which unmoved coins would be locked or redistributed. Critics warn this could establish a dangerous precedent for network intervention and potentially confiscate Satoshi's coins, fundamentally altering Bitcoin's social contract. The debate highlights the tension between preserving Bitcoin's ideological foundations and adapting to existential technological threats that its creators could not have anticipated.