Mastercard and MetaMask have partnered to launch a self-custody crypto payment card, allowing Ethereum users to spend their digital assets at over 150 million merchants worldwide. This innovative card connects directly to MetaMask wallets and supports stablecoins such as USDC and USDT, aiming to enhance the use of cryptocurrencies in daily transactions. The collaboration marks a significant step towards integrating digital currencies into mainstream financial systems, promoting broader adoption and convenience for crypto users.