What assets must be unstaked on Coinbase?

As a cryptocurrency enthusiast and investor, I'm curious about the staking process on Coinbase. Could you elaborate on what assets specifically need to be unstaked on the platform? I understand staking is a way to earn rewards for holding cryptocurrencies, but are there certain assets that cannot remain staked if I wish to access them or trade them freely? It's important for me to understand the staking requirements and limitations to make informed decisions about my portfolio.