Canadian Entrepreneur Loses $1.6M in Bitcoin as Coldcard Seed Flaw Hits 4,585 Wallets
Jonathan Goodman did everything right. The Canadian entrepreneur kept his Coldcard hardware wallet locked in a safety deposit box, never touched the internet with it, followed every best-practice guideline he could find. And on July 29, 2026, he still lost 18.25 BTC — roughly $1.6 million — in seven minutes flat.