The most famous wallet in cryptocurrency history is caught in a high-stakes security debate. Bitcoin developers are fiercely arguing over a proposal to permanently freeze the 1.1 million coins mined by pseudonymous creator Satoshi Nakamoto. The network faces a looming timeline to upgrade its cryptography against quantum computers, and older inactive addresses are directly in the crosshairs.
The urgency started in March 2026. Google’s Quantum AI team published a paper showing that breaking Bitcoin’s 256-bit elliptic curve cryptography requires fewer than 500,000 physical qubits. That is a 20-fold reduction from older estimates. Experts now project that “Q-Day” — the moment quantum machines can crack standard encryption — could arrive in five to eight years.
The 12-Month Window to Move $700 Billion
Right now, roughly a third of the circulating supply sits in vulnerable legacy addresses. That equates to about $700 billion worth of Bitcoin. Proponents of the freeze want a six- to 12-month grace period. Users would migrate their funds to new, quantum-resistant addresses. After the window closes, any unmigrated coins get frozen by the protocol so malicious actors cannot steal them.
Binance founder Changpeng Zhao supports the migration window and the subsequent freeze for unowned legacy coins. But the idea faces heavy resistance. Critics argue that freezing any funds violates the core principles of permissionless ownership and self-custody. Blockstream developer Adam Back maintains the quantum threat is still 20 to 40 years away.
Developers did take technical steps in February 2026 by merging BIP-360 into the core repository. The upgrade introduces a pay-to-Merkle-root output type. This protects newly stored coins by eliminating the quantum-vulnerable key-spend path.
How Rival Networks Are Handling the Quantum Timeline
The debate highlights a stark contrast in how major blockchains manage existential security threats. While Bitcoin developers argue over the ethics of freezing Satoshi’s legacy coins, rival networks are moving preemptively.
Ethereum established a dedicated Post-Quantum Security team in January 2026 to secure their infrastructure. The Bitcoin ecosystem must eventually choose between violating its fundamental immutability rules to protect dormant users, or leaving millions of vulnerable coins exposed to future quantum attacks.