Coinkite

Coinkite is a legendary hardware manufacturer in the Bitcoin space, famous for the Coldcard wallet. The Coldcard is widely considered the most secure Bitcoin-only hardware wallet for advanced users, offering air-gapped functionality and PSBT (Partially Signed Bitcoin Transactions).

Coinkite also sells Opendime (disposable hardware wallets) and other security tools. They run an affiliate program where Bitcoin educators and influencers can earn commissions. It is a legitimate, Bitcoin-only company that prioritizes extreme security and privacy features for HODLers.

Frequently Asked Questions

1. What is air-gapped?

Air-gapped means the device never touches the internet or a computer directly. With Coldcard, you transfer transaction data via a MicroSD card, ensuring your private keys are never exposed to online malware or hackers.

2. specific affiliate program?

Yes, Coinkite has an affiliate program that pays commissions (typically 10-15%) on sales of their hardware products. You can apply on their website and get paid in Bitcoin or Fiat.

3. Do they support altcoins?

No, Coinkite and the Coldcard wallet are strictly Bitcoin-only. By removing code for other coins, they reduce the "attack surface" of the device, making it more secure for Bitcoin storage.

4. What is Opendime?

Opendime is a small USB stick that acts like a physical Bitcoin bearer bond or "cash." You load it with Bitcoin, and pass it to someone else. They verify the balance, and to spend it, they must physically break a seal to reveal the private key.

5. Is it good for beginners?

The Coldcard is designed for intermediate to advanced users who understand UTXOs and air-gapped workflows. Beginners might find it steeper to learn than a Ledger or Trezor, but the security benefits are significant.