What is Coinbase ETF & how does it work?

Could you elaborate on the Coinbase ETF and its operational mechanics? Specifically, I'm interested in understanding what this ETF stands for, its objectives, and how investors can leverage it to gain exposure to the cryptocurrency market. Additionally, I'd like to know if there are any unique features or benefits that Coinbase ETF offers compared to other crypto-related investment products. Finally, could you provide an overview of the risks involved in investing in such an ETF and any potential implications for investors' portfolios?