I read that Starbucks denied this news. Starbucks plans to participate in the development of Bakkt along with ICE and Microsoft, but this does not mean that it intends to introduce a payment tool into its business. The company clarified that they are considering such an opportunity after governments adopt laws on the regulation of crypto-currencies. Until then, you will not be able to pay coins for coffee.
Indeed, from what i understand, starbucks just participate in development of BAKTT. I am believe starbucks bussiness not just a coffe shop because they are big company and maybe starbuck want to expand their bussiness on crypto market