Mastercard's stablecoin settlement on public blockchains.

On June 3, Mastercard said it will let banks settle card transactions using regulated stablecoins, across eight public blockchains including the XRP Ledger. Ripple's RLUSD and Circle's USDC are among the supported tokens.

Settlement is the back-end step where the banks behind a card move the actual money to each other after you pay. It normally runs on banking hours, so a weekend purchase waits until Monday. A stablecoin moves on-chain at any hour, so that step can clear on weekends and holidays too.

The swipe at checkout does not change. What changes is the plumbing behind it. A public chain is now settlement infrastructure for one of the largest card networks, not a parallel experiment beside it.