Fast and secure exchange of Bitcoin, Ethereum, Tether, as well as numerous other altcoins at the most favorable rates.
Secure your Bitcoin and sleep like a baby. COLDCARD is the world’s most trusted and secure Bitcoin Signing Device. It provides the best Physical Security. Your seed words are stored in specialized chips, designed solely to securely store secrets. Now dual-vendor! All the Coldcard code is viewable, editable, and verifiable. You can compile it yourself.