Coinbase CEO Personally Leading Effort to Protect Bitcoin From Quantum Computing Threats

TLDR

• A research paper from Google’s Quantum AI team states that a future quantum computer could calculate a Bitcoin private key from a corresponding public key in roughly 9 minutes
• Around 6.9 million BTC (equal to roughly one-third of Bitcoin’s total circulating supply) are stored in wallets with permanently exposed public keys, leaving these funds vulnerable to attack
• Bitcoin’s average block confirmation time is around 10 minutes, which gives an attacker a roughly 41% chance of stealing funds while a transaction is still pending
• Coinbase CEO Brian Armstrong says he will personally work to make Bitcoin quantum-resistant, and pushes for progress “sooner rather than later”
• Quantum-resistant tokens saw sharp price gains following the news: QRL jumped 51%, while Algorand gained 42% over seven days

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(SeaPRwire) –   Google released a new research paper this week that warns a future quantum computer could break the cryptographic math that protects every Bitcoin wallet. The paper, from Google’s Quantum AI division, was published on March 31 and sent shockwaves across global crypto markets.

BREAKING: Coinbase CEO Brian Armstrong says Bitcoin’s quantum threat “needs to be solved soon,” as he pushes for network upgrades to make BTC quantum-resistant. pic.twitter.com/CDy4r63jhH

— SwanDesk (@SwanDesk) April 3, 2026

As the news spread, Bitcoin was trading near $66,900. The Crypto Fear and Greed Index dropped to 11, landing firmly deep in “extreme fear” territory.

The core issue stems from how Bitcoin transactions operate. When you send Bitcoin, your wallet uses your private key to sign the transaction. This signature exposes your public key to the network, where it sits in a pool of unconfirmed pending transactions called the mempool.

Right now, no existing computer can reverse-engineer a private key from a public key within any practical timeframe. But Google’s paper finds a quantum computer running a well-known algorithm could complete this process in about nine minutes.

Bitcoin blocks are confirmed roughly every 10 minutes on average. That means an attacker using a sufficiently powerful quantum computer would have a roughly 41% chance of stealing your funds before your transaction is finalized on the network.

Google estimates that such a machine would need fewer than 500,000 physical qubits. For context, today’s most advanced quantum chips only have around 1,000 physical qubits.

The Bigger Threat: Exposed Wallets

The nine-minute in-transaction attack has grabbed most headlines, but security researchers say the larger threat already exists permanently on the blockchain.

An estimated 6.9 million Bitcoin — about one-third of all circulating supply — are held in wallets where the public key is permanently visible. These include early-era Bitcoin addresses and any wallet that has reused an address multiple times.

These coins are more vulnerable because an attacker would not need to race against the block confirmation clock. They can work through exposed keys one by one, at any time that suits them.

Bitcoin’s 2021 Taproot network upgrade made the issue slightly worse by setting public keys to be visible on-chain by default, expanding the pool of exposed vulnerable wallets.

Among the exposed holdings is an estimated 1.1 million BTC linked to Bitcoin’s pseudonymous creator, Satoshi Nakamoto.

Industry Response

Coinbase CEO Brian Armstrong responded within hours of the paper’s release. He confirmed he will personally work on addressing the issue and called for a solution “sooner rather than later”. Coinbase is assembling a team of Bitcoin core developers to coordinate a shift to quantum-safe cryptography.

Blockstream Research has noted that post-quantum security work is already underway on the Liquid Bitcoin sidechain.

Not all industry players see this as an immediate emergency. Grayscale called the current quantum panic a “red herring”, noting that if quantum computers break Bitcoin’s encryption, global banking and internet infrastructure face the exact same risk. Former Binance CEO Changpeng Zhao said crypto will “adapt and survive”.

The National Institute of Standards and Technology has already published post-quantum cryptography standards that Bitcoin developers can adopt. A Bitcoin Improvement Proposal called BIP-360 outlines a clear migration path, though coordinating changes across Bitcoin’s decentralized network remains a major challenge.

Bitcoin’s mining process uses a separate algorithm called SHA-256, which quantum computers cannot meaningfully attack with current known approaches. Bitcoin blocks would still be produced normally.

Quantum-resistant tokens saw sharp price movement following the news. QRL jumped 51% over the past week. Algorand, which was cited 32 times in Google’s paper for its post-quantum research, gained 42% over seven days.