To PQ or Not to PQ: Bitcoin's Quantum Upgrade Drama Just Got Real

The Bitcoin community is currently arguing about whether racing to hit the 2029 post-quantum migration deadline is genius or just another occasion to watch maximalists fight online. Spoiler: it's mostly the latter.

Enter Samson Mow, founder of JAN3—a firm that helps nation-states stack sats—ready to throw hands at anyone pushing for unverified post-quantum solutions. "Solving the QC problem later rather than sooner is the best course of action," he declared, basically telling Coinbase CEO Brian Armstrong to slow his roll on the PQ upgrade hype train.

Mow's got a few problems with rushing this thing. For one, deploying untested PQ solutions could open Bitcoin up to attacks from current classical computers—not exactly the upgrade we want. Second, those PQ signatures everyone's excited about? They're absolute units, clocking in at roughly 10 to 125 times larger than today's signatures. That means transaction throughput would take a nosedive faster than BTC in a bear market.

Translation: Blocksize Wars 2.0, baby. Solana, no stranger to speed itself, has already warned that current PQ solutions could slow it down by 90%. That's like watching your sports car transform into a Prius.

Mow also stirred the pot by suggesting the NSA might be pushing PQ standards riddled with hidden backdoors—a prospect that would make surveillance enthusiasts smile like they just found seed phrases taped to a bulletin board.

The discourse reignited after Google Quantum AI dropped a report suggesting Bitcoin's encryption might get cracked sooner than expected. Their advanced quantum processors could allegedly compromise crypto security with around 500,000 physical qubits or 1,200–1,450 stable logical qubits. That's significantly lower than previous estimates calling for millions of qubits—like the goalposts moved 50 yards closer.

Google strongly suggested upgrading to PQ by 2029 to protect roughly 7 million BTC from becoming quantum casualties. That's less than three years away, people. We can argue about blockspace for decades but apparently need to solve quantum computing in a single Bitcoin halving cycle.

But here's the kicker: Bitcoin's track record suggests protocol changes take roughly forever and never happen without someone rage-quitting Twitter. Charles Edwards of Capriole Investment thinks BTC won't see a new all-time high until it migrates to PQ. Meanwhile, crypto veterans like Adam Back and Grayscale's Zach Pandl insist physical quantum computers remain years from market reality—like, maybe longer than your last DeFi yield farm lasted.

"Investors should not fret," Pandl noted. "There is no security threat to public blockchains from quantum computers today. But it's time to accelerate efforts to prepare for our post-quantum future." In other words, don't panic, but definitely start sweating a little.

On the bright side, most investors have already self-custodied their way into more resistant address types like Segwit and P2WPKH—leaving only Satoshi-era whales and fancy Taproot wallets as potential quantum targets. So if your coins do get quantum-hacked, at least you won't be alone. Just some very old, very wealthy people losing their stack right alongside you.