Keycard is designed to safely store private keys offline in an air-gapped environment. They never leave the secure element of the card and are always kept offline.
When used with the Status app, Keycard does not support non-ethereum tokens, which means that you cannot store tokens like Bitcoin or Litecoin on it. However, it supports all ERC-20 tokens, and you can still store bitcoin on it by exchanging your BTC to ERC-20 compliant Wrapped Bitcoin (WBTC).
Nevertheless, more technically adept developers can integrate Keycard with their own products using the Open Source Keycard API and use it to store any other cryptocurrencies that use secp256k1 ecdsa signatures, which includes Bitcoin (BTC), Litecoin (LTC), XRP, Bitcoin Cash (BCH), and other crypto assets.
The Keycard wallet is a secure, open-source, contactless hardware wallet with open API, built as a part of the Status Network.
At the moment, Keycard can be used as a hardware wallet only, but its roadmap includes introducing physical payments with Keycard, where your phone acts as a universal digital wallet.