You can buy price exposure to BTC on there but you can never deposit or take possession of any actual BTC through them.
It's an actual card, not a virtual card. And it's a debit card, not a credit card. It should also have a conventional bank account attached to it, or at least mine does, so transfers to Coinbase should be possible.
Actually they have a virtual card I use them before when I was in marketing trying to use their service just to have adwords account with free $100 USD.
You can request 10x virtual card from their app with a fee but I don't know if they still have this feature because the last time that I use their service is November 2016. I don't know if their remove the Virtual card from their app I'm just bought my Revolut account to someone in BHW before.
There's an option to buy Bitcoin directly in the Revolut app
https://www.revolut.com/exchange-cryptocurrencyJust you have to enable it in the dashboard (last tab).
Unfortunately I don't know anything else than that this option exists. No prices/fees, no info about the fees for withdrawal into a proper Bitcoin wallet...
They allow buying Bitcoins or other crypto but I think they don't allow to send crypto out from their wallet to other wallets but they allow to send your crypto to other Revolut accounts as their cryptocurrency terms.
Take a look at this terms from here
https://www.revolut.com/legal/cryptocurrency-termsAnd read this
https://community.revolut.com/t/send-btc-ltc-eth-to-other-wallets/19056/4So it means that if you buy Crypto from revolut you can't transfer them to other wallets you can only transfer them to other Revolut users.