Quantum Computing: The FUD You Can't Hack—But Maybe Can't Ignore Either

Samson Mow is sounding the alarm on quantum computing threats to Bitcoin—but not in the way you might think. The Jan3 founder and die-hard Bitcoin advocate is warning that rushing to implement post-quantum cryptography could actually create more problems than it solves. Because nothing says "secure" like panicking into a solution that might break everything twice.

Mow took to X this weekend to push back against calls from Coinbase CEO Brian Armstrong and chief security officer Philip Martin, who have been urging the industry to get ahead of quantum computing threats sooner rather than later. While everyone agrees quantum computers could eventually break current cryptographic standards, Mow argues that moving too fast might leave Bitcoin vulnerable to good old-fashioned attacks. Classic crypto wisdom: fix one thing and somehow create three new ways to get rekt.

"Simply put: make Bitcoin safe against quantum computers just to get pwned by normal computers," Mow tweeted. A masterclass in trading one existential threat for another, apparently.

The core issue? Post-quantum signatures are massive. We're talking 10 to 125 times larger than current signatures, which could tank network throughput and potentially reignite the dreaded block size wars. Yes, folks—Blocksize Wars 2.0 could be coming to a blockchain near you. Nothing brings the community together quite like arguing about block size while quantum robots wait in the shadows.

Meanwhile, Circle's upcoming Arc Network is taking a different approach, announcing quantum-resistant features from launch. Unlike a rushed Bitcoin migration that could take months of continuous processing, Arc is going opt-in with no mandatory network reset. Naoris Protocol also just dropped its mainnet with post-quantum cryptography baked in from day one. Building quantum resistance into your chain from day one: either genius or just really good timing. We'll find out together.

Google researchers recently threw more fuel on the fire, suggesting quantum threats could materialize by 2032—earlier than previously projected. The National Institute of Standards and Technology has even warned about "harvest now, decrypt later" attacks, where adversaries are already collecting encrypted data today for future decryption. So yeah, your encrypted secrets might already be on someone else's hard drive, waiting politely for quantum computers to do the heavy lifting. Very cool, very normal, very fine.

But Mow's not saying do nothing. "Given that quantum computers don't actually exist and likely won't exist for another 10-20 years, the worst possible course of action is to rush a fix," he said. "That's not to say work shouldn't be done to prepare, and there is already much work being done." Patience: apparently still a virtue in crypto, against all odds.

So while the quantum apocalypse—or "Q-Day" as the cool kids call it—might be approaching, it seems the crypto world is finally learning to walk before it runs. Probably for the best. Last time we ran headfirst into something, we got three forks, four Twitter beefs, and a guy selling his kidney for a JPEG. Slow and steady wins the race, or at least loses less dramatically.