Can they be loaded only with Bitcoin or some other currencies as well? And how can I use those Bitcoins with this card? Like any other credit/debit card for online purchases and by using terminal? If so, will my Bitcoins convert automatically into some local currency or can I use it only to buy things, which price is defined in bitcoin? Or is it more like a wallet for storage crypto?
For now, at my knowledge Icarus cards are BTC-only. Would love some XMR cards btw.
If you want to spend your BTC, you have to import the private key hidden on the card. It can be done easily through Electrum.
Once done, you will have access to the funds.
These cards are more like collectibles, they are not able to make payments.