After teasing for two days, @0xPolygon finally revealed the big move! Mastercard is bringing the idea of simplifying 'card numbers' into 'usernames' onto the blockchain, choosing Polygon as the settlement layer. The project Mercuryo will handle KYC and issue credentials, allowing self-custody wallet users to transfer funds by simply entering a username—no need to copy those 0x addresses anymore. Check out the demo video. Honestly, it’s basically 'DID' and 'short domain names'... just another repackaging of concepts for the OG crypto crowd. But for users unfamiliar with this new concept, this innovative feature could drive broader adoption of cryptocurrency and offer fresh ideas for the future of payment systems.