it is not the future, but already the present. I heard that the PayPal allowed the use of cryptocurrency. Which means that each user of their service can pay with a crypto through a paypal card.
Not true. They're backing Facebook's Libra (which is as much a cryptocurrency as centralized barely-crypto coins like Ripple and Tether), but they don't want anything to do with other crypto at the moment.
As for crypto debit card alternatives,
this article has a detailed list.