How much does Coinbase custody cost?

I'm curious to know, what is the cost associated with using Coinbase Custody for storing and securing my cryptocurrency holdings? As a serious investor in the crypto space, it's essential for me to understand the fees and charges involved in this service, as it plays a crucial role in managing my assets securely. Can you provide me with a breakdown of the various costs and fees that I might encounter when utilizing Coinbase Custody for my cryptocurrency investments?