Aren't debit cards already existing for that same manner? Although it isn't cryptocurrency, more like digitized fiat currency, but still it can do the same thing as the existing coins we got now these days.
Except the debit card is as centralized as it can be while cryptocurrencies let the control be in the people's hands. The already-existing virtual fiat (the one we also see on cards) can be deposited, withdrawn, received and spent but you don't get most of the features Bitcoin or other cryptos currently offer. They're two completely different things, although they do seem/feel similar at a very first glance.
From what I can see, they'll just seemingly to adopt these cryptocurrency we got in the market, just like how Paypal did, though it isn't entirely a bank.
CBDCs will not be the cryptocurrencies we currently have. That'd be a huge loss in the face of cryptos I'm quite sure they won't take and would also be a very unusual choice. PayPal's choice has nothing to do with the Central Banks' either. CBDCs will create their own coin that they can properly and actively monitor & control.