Google Warns: Future Computers Could Hack Bitcoin Sooner Than Expected

Imagine if someone could crack the password to every Bitcoin wallet in the world. That's what Google researchers are warning could happen sooner than we think, thanks to powerful new computers called quantum computers.

What Are Quantum Computers? Quantum computers are super-powerful machines that work differently from regular computers. While your laptop uses bits (1s and 0s), quantum computers use "qubits" that can be multiple things at once. Think of it like a coin that's spinning in the air - it's both heads and tails until it lands. This makes them incredibly fast at solving certain problems, including breaking the security codes (cryptography) that protect Bitcoin wallets.

The Big Discovery Google's team found that breaking Bitcoin might need only 500,000 qubits - much less than the millions experts previously thought necessary. They also discovered that Bitcoin's Taproot feature (a technology meant to make transactions more private) might actually make it easier to hack. Google believes useful quantum computers could arrive by 2029, giving the crypto world just three years to prepare.

How Would an Attack Work? When you send Bitcoin, you briefly reveal a "public key" (like showing your account number). A fast quantum computer could use this information to figure out your "private key" (your password) and steal your funds before the transaction completes. It's like someone seeing your house key for a split second and instantly making a copy.

What Else Is Happening? • OpenAI raised a record $122 billion, becoming the most valuable startup ever • Major cryptocurrencies like Bitcoin, Ethereum, and Solana are working on quantum-resistant security • Coinbase's Base platform plans to focus on tokenized markets and stablecoins in 2026

The crypto industry now faces a race against time to upgrade security before quantum computers become powerful enough to pose a real threat.

This is an AI-generated summary. Read the original article at: https://www.coindesk.com/tech/2026/04/01/the-protocol-quantum-computing-could-break-bitcoin-sooner-says-google