Coldcard biggest security failure cost $70M

Galaxy Research: 1,082.65 BTC (~$70M)from1,196addressesbetween01:10–01:50UTCJuly30—upfromearlier594BTC/$38M estimates. Affected firmware traced to 4.0.0 (March 2021) through later versions; patched in 4.21+. Users must migrate funds to newly generated seeds. Over 562 BTC consolidated to one address.