A growing number of exchanges offer crypto payment cards. Credit: Rann Vijay via Pexels. Key Takeaways Crypto exchanges increasingly offer debit and credit cards. Card payments are funded by crypto balances. OKX is the latest exchange to jump on the crypto card bandwagon. OKX is the latest exchange to offer a payment card that lets users spend crypto balances, joining the likes of Binance and Coinbase in the increasingly crowded sector. For its offering, OKX selected a Mastercard debit card denomina ...