That premise is logically flawed but narratively strong. unless incentivized/harness otherwise, agent's only goal is efficiency. They choose whichever rail CC or stablecoin, has the least friction
Winners like Stripe and Alipay will just abstract the choice away by integrating both
I don't understand the premise that "agents must use stablecoins."
Why can't an agent remember the 16 digits of a credit card?
Sorry maybe I'm a payments n00b. Stablecoins have a lot of great use cases, but ecommerce shopping is pretty well optimized already for cards.