The cryptocurrency services include the ability for consumers to buy, sell and hold digital assets through custodial wallets powered by the Bakkt platform and streamlined issuance of branded crypto debit and credit cards with digital asset loyalty rewards.
https://www.notebookcheck.net/Mastercard-partners-with-Bakkt-to-bring-cryptocurrency-services-to-hundreds-of-millions-of-U-S-customers.575104.0.html