Comment by pclmulqdq

There is no concept of "coin storage" in the actual security model of cryptocurrency. The security model of cryptocurrency is about the storage of keys.

"Cold storage" has come to mean that the keys are stored in some offline location. It doesn't necessarily mean that the keys are hard to access or that the money being moved is otherwise hard to get to. That is used to be what it means, but practically, a wallet on a hardware keychain is called "cold" exactly the way a wallet whose keys are split up on slips of paper between 5 different physical vaults is "cold."