A significant data breach has impacted Coldcard, a bitcoin-only hardware wallet manufacturer based in Toronto. The hack has resulted in the theft of over $100 million US worth of bitcoin. Coldcard is known for its security focus, making the breach particularly concerning within the cryptocurrency community. Details regarding the nature of the breach are still emerging, but the financial impact is substantial. This incident raises questions about the security of even highly-regarded hardware wallets, and the broader vulnerabilities within the cryptocurrency ecosystem. Investigations are underway to determine the full extent of the damage and prevent future attacks. This event highlights the continuing risks associated with digital asset storage.