You can transfer funds from your trading balance to a vault balance (cold storage) on Coinbase Prime. To deposit funds:
From the portfolio tab, search for the asset.
Click the asset to open the asset page.
Under Vault Balance, click Deposit.
Click Transfer from Trading Balance.
Select the portfolio and wallet you’ll be transferring from.
Enter the amount.
Click Preview Transfer.
Review the details then click Initiate Transfer.
Verify your identity using a physical security key.
This action may require additional consensus approvals before it’s processed.
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Transfer funds (cryptocurrency) between vault balances on Coinbase Prime