moving into the stablecoin market makes it so that your platform is able to issue a currency that can be sent to other exchanges or held on any erc20 wallet. this makes your product versatile and allows users the chance to escape volatility.
Making a stablecoin also gives coinbase access to the potential userbase that will come from goldman Sachs when they begin seriously sending investors over to crypto. They are trying to position themselves in a spot to no only be the go to retail investor spot but also serve the coming Institutional investments that are"rumored".