Every big merchant is a stablecoin issuer waiting to happen

Walmart processes around $700 billion in annual sales. Of that, billions flow out every year as card interchange fees, landing at the networks (Visa, Mastercard, Amex) and the issuing banks.OnePay, Walmart’s fintech arm, is already rolling crypto out to its mobile banking app. Which makes the next step pretty easy to sketch out.Imagine a stablecoin controlled by Walmart. Call it Walmart Dollars, or WUSD. Customers hold WUSD inside the app, pay with it at checkout, and the interchange layer goes away. Walmart passes most of the savings back as a discount to the consumer. Walmart also earns yield on the AUM sitting in its treasury, which funds deeper rewards.Customer gets a better deal. Walmart improves its supply chain, drives loyalty, and controls its payment stack. Visa and Mastercard get cut out of one of their largest single merchants.Run the same playbook through Target, Starbucks, Uber, every airline loyalty program, every big merchant with distribution. Each is a candidate. Most of them are already thinking about it. Some will launch in the next 12 months.My sense of where this lands: one or two dominant settlement rails underneath, and a long tail of branded stablecoins on top functioning more like loyalty programs and ecosystem currencies than money.The right question isn’t whether USDC or USDT wins. The more interesting question is what happens to consumer payment economics, FX, and settlement when a hundred branded dollars circulate alongside two or three universal ones, and what that does to the banks.