Stablecoins have spent years inside crypto trading. Their role in payments is becoming much more interesting.

Yellow Card recently raised $40 million to expand its stablecoin infrastructure across Africa. The company provides infrastructure for businesses that need to move money across markets, where traditional payment systems can be fragmented and expensive.

The funding itself is less interesting than the type of infrastructure being built around stablecoins.

A cross-border payment starts with a simple requirement: move a specific amount of value from one party to another.

The underlying system has to deal with several more problems.