CZ Floats Freezing Dormant Bitcoin Against Quantum Theft, Says It Is Not His Call

Changpeng Zhao, the Binance founder known as CZ, has reignited one of Bitcoin's thorniest long-term debates: what to do about the millions of coins that could one day be vulnerable to quantum computers. Speaking on the Galaxy Brains podcast with Galaxy Research's Alex Thorn on June 18, 2026, CZ floated the idea that dormant, quantum-vulnerable coins, including the roughly one million Bitcoin attributed to Satoshi Nakamoto, could be frozen if Bitcoin ever upgrades to defend against quantum attacks. He was careful to add that this is not his decision to make and would require consensus across the Bitcoin community.

What CZ actually said

CZ's suggestion was a hypothetical, not a proposal he is pushing. The mechanism he described is straightforward: if Bitcoin adopts quantum-resistant cryptography, holders would get a migration window, which he put at roughly six to twelve months, to move their coins to new protected addresses. Any coins left unmoved after that window, presumably because their keys are lost or their owners are inactive, would then be frozen under the new rules. His key point was that the hard part is not the cryptography, which researchers can build, but reaching agreement across a decentralized network on whether and how to do it.

The real work happening behind the debate

CZ's remark overlaps with actual, on-the-record proposals, though it is important not to conflate them. Two draft Bitcoin Improvement Proposals are at the center of this. BIP-360 introduces a new quantum-resistant address type as a soft fork, authored by Hunter Beast, Ethan Heilman, and Isabel Foxen Duke. BIP-361, whose authors include Jameson Lopp, would sunset legacy quantum-vulnerable signatures after a deadline. Both are in Draft status, meaning they are under discussion and have not been adopted into Bitcoin's consensus rules. It is BIP-361's signature sunset, not anything CZ proposed, that would actually freeze un-migrated coins.

The Satoshi dilemma

This is where the ethics get uncomfortable. By some estimates, around 1.7 million Bitcoin sit in ancient address types that would be vulnerable, including roughly one million linked to Satoshi. If a signature sunset ever activated and those keys are truly lost, those coins would become permanently unspendable. Supporters argue that is better than leaving them as a giant prize for a future quantum attacker, who could otherwise steal and dump them. Critics argue that deliberately freezing anyone's coins, even dormant ones, violates Bitcoin's core promise of immutability and property rights. There is no easy answer, which is exactly why CZ framed it as a community question rather than a technical one.

How real is the quantum threat?

It is real but not imminent. No quantum computer today can break the cryptography securing Bitcoin. Researchers at Google Quantum AI have estimated that breaking the elliptic-curve signatures Bitcoin uses could require fewer than 500,000 qubits, far beyond current machines, but the estimate keeps falling, which is why the conversation is happening now rather than later. The point of debates like this one is to have a plan in place long before the threat becomes practical. None of this is settled, and nothing is changing in Bitcoin's rules today. This article is information only and is not financial advice.