Stablecoins — cryptocurrencies pegged to an external currency — have the potential to rewire the global financial system, and expose banking and finance to new digital competition. Now, there is intensifying competition among stablecoin issuers, prominent digital wallet providers, and traditional banks, each racing to establish their platform as the dominant one. The outcome will be consequential not only for financial institutions but for any company and digital platform that relies on money movement at scale. The stablecoin wars, like the battle for home video, will not be decided by better tech or incumbency, but by the applications. While regulators can make it significantly harder for innovators to compete, they will not be able to stop them forever. In the end, the most likely outcome is one with many stablecoins that fade into the background and deliver lower-cost, faster payments to the world.