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What is the Coinkite Coldcard? It’s a Bitcoin hardware wallet, so it signs transactions and can be used offline.
- BIP39 based, which means you can backup the secret words onto paper, and have lots of sub-accounts and unlimited independent payment addresses.
- It knows how to understand transactions, so you can see what you are approving.
- The first PSBT (BIP 174) native wallet which can be used completely offline for it’s entire lifecycle.