What is Bigtime by Coinbase?

Could you please elaborate on what Bigtime by Coinbase is? As a cryptocurrency enthusiast, I'm always on the lookout for innovative platforms and solutions. Is Bigtime a new trading platform, a wallet service, or something entirely different? What specific functionalities does it offer? Is it aimed at retail investors or institutions? Furthermore, how does it integrate with Coinbase's existing services and how does it differentiate itself from the competition? I'd also be interested to know if there are any specific requirements for users to access Bigtime, and what Coinbase's vision is for this new offering.