THE DEATH OF THE INTERFACE

Summary from the TLDR Crypto newsletter

David Marcus, who led Meta's M assistant and Libra and now runs Lightspark, argues that AI models and stablecoin law have finally arrived together, so apps, websites, and buttons will give way to agents you simply talk to. Payments today assume a human in the loop (checkout pages, texted codes, fraud, and dispute flows), so money must stop moving through a UI. Stablecoins are no longer a standalone category. To be useful, they need fast settlement networks, embedded wallets, fiat connectivity, and card networks, which he calls “headless money,” a simple API that agents can use to move value anywhere, 24/7, with revocable spending limits and clear liability for mistakes. A few payment-stack companies will be worth hundreds of billions, but the companies running the winning agents will earn far more, since payment stacks earn only 1 to 300 basis points.