A Cold Storage Coin supports multiple deposits, but only a single withdrawal.
All funds must be withdrawn in one transaction. Once a withdrawal is completed, the coin should no longer be used or funded.
This single-withdrawal design is a core security feature.
To withdraw assets, the silver and yellow stickers on the back of the coin must be removed in sequence to access the full private key:
- The silver sticker is the outermost layer. Removing it reveals the yellow sticker beneath
- The yellow sticker contains the Private Key Entropy
- The Passphrase Entropy is laser-engraved directly on the coin
Both components are required to reconstruct the private key.
Once the stickers are removed:
- The Private Key Entropy (yellow sticker) may be lost or damaged
- The private key data may be exposed to anyone with access to the coin
Any funds deposited after this point may become permanently unrecoverable or stolen.
For this reason:
- Do not deposit new funds after the coin has been opened
- Transfer all assets out in one transaction when withdrawing
The Cold Storage Coin is designed for long-term storage or gifting — not for repeated or everyday transactions.