Arthur Hayes on Bitcoin Quantum Risks

Quantum fears don't mean sell Bitcoin, address reuse is the real threat.

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Oct 18, 2026

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Arthur Hayes on Bitcoin Quantum Risks

Quantum fears don't mean sell Bitcoin, address reuse is the real threat.

In brief

Quantum fears don't mean sell Bitcoin, address reuse is the real threat. Bitcoin holders should stop reusing addresses to avoid quantum attacks, not sell due to quantum computing fears. Originally reported by 24/7 Wall St..

Quantum Computing Fears

Quantum Computing Fears

Arthur Hayes says quantum computing fears shouldn't push people to sell Bitcoin.

“BitMEX co-founder Arthur Hayes says quantum computing fears have Bitcoin holders spooked for the wrong reason”

The Real Risk

Modern way of exchange. Bitcoin is convenient payment in global economy market. Virtual digital currency and financial investment trade concept. Abstract crypto

The actual vulnerability hiding in plain sight is address reuse among Bitcoin holders.

“the actual vulnerability hiding in plain sight has nothing to do with the technology itself”

Bitcoin Address Security

Payment. Hands typing on laptop with online transactions, e-commerce checkout, and digital banking systems.

Each Bitcoin address links to a unique key pair with a private key for spending and public key for verification.

“Every Bitcoin address is linked to a unique key pair. The private key is the secret that allows the owner to spend the coins, while the public key is displayed on the blockchain to verify the owner’s transactions”

Quantum Attack Risk

Bitcoin Cryptocurrency is Digital payment money, Gold coins with B letter symbol electronic circuit on EURO EYP20 bill.Cryptocurrency can uses designed,Business

Reusing addresses exposes public keys to future quantum attacks if coins are continuously received.

“If the owner keeps receiving coins at that address, those new coins rest behind an exposed public key and become a potential target for future quantum attacks”

Exposed Keys Problem

Coinbase research shows 20,000 addresses with at least 50 BTC each have exposed keys.

“Research from Coinbase has highlighted around 20,000 addresses containing at least 50 BTC each that have exposed keys”

Address Reuse Solution

Using a new address for each transaction hides your public key until spending.

“A new receiving address for every transaction keeps your public key hidden until you spend from it”

Quantum Computing Timeline

Quantum computers cannot break Bitcoin's cryptographic security yet and may take years to prepare for post-quantum cryptography.

“Quantum computers do not yet have the capability to break Bitcoin’s cryptographic security”

Market Reaction

Bitcoin rose 26.1% over 60 days despite growing quantum computing warnings.

“Bitcoin rose 26.1% over the 60 days leading up to mid-October, even as warnings about quantum technology grew”

The bottom line

Bitcoin holders should stop reusing addresses to avoid quantum attacks, not sell due to quantum computing fears.

Read the original on 24/7 Wall St.

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