Stablecoins, much like traveler's checks, are poised to revolutionize cross-border transactions, according to an Ethereum Foundation executive. While traveler's checks gained global acceptance through networks like American Express and Visa, stablecoins currently lack a universal mechanism for redemption at face value through regulated financial institutions. The executive suggests that if stablecoins are allowed to generate returns, the market could see explosive growth, positioning them as competitors to deposits, money market funds, and treasury bills for idle funds.