Post-quantum cryptography could make Bitcoin’s signature sizes balloon by as much as 125 times — a technical reality now fueling a sharp debate over how fast the network should act.
Mow Calls Out The RushMow pushed back hard. A rushed transition to post-quantum cryptography, he said, risks opening up fresh vulnerabilities — including compatibility breakdowns and a sharp drop in how many transactions the network can handle at once.
“Simply put: make Bitcoin safe against quantum computers just to get pwned by normal computers,” Mow wrote on X.
It’s been almost 10 years since the Blocksize Wars ended and Brian hasn’t changed at all.
A Ghost From Bitcoin’s PastFormer Bitcoin developer Jonas Schnelli put numbers to it, and Mow cited them directly. The implications go beyond speed. Block size has been a flashpoint before.
Between 2015 and 2017, a bitter community dispute over whether to expand Bitcoin’s block size tore the ecosystem apart and ultimately led to a chain split.
That fight raised deep questions about decentralization, network security, and who really gets to decide Bitcoin’s direction. Mow is warning the same battle could be coming back — what he’s calling “Blocksize Wars 2.0.”
Mow isn’t saying quantum threats should be ignored. His argument is about timing, not priority. Research on potential solutions is already underway, he said, and that work should continue.
Armstrong and Martin flagged those findings as reason enough to move the timeline up. Mow’s position: the cure could be worse than the disease, at least for now.
Featured image from Trade Brains, chart from TradingView
