Rising stablecoin card spending should not be confused with a self-contained stablecoin economy, as cards make the off-ramp seamless, while merchants still largely receive traditional money. As digital dollars proliferate across issuers and blockchains, processors and card networks could gain value by translating fragmented stablecoin balances into conventional payments. Instead, they are partnering to put a digital-dollar balance behind a familiar card and letting existing payments infrastructure handle the rest. Rather than overthrowing the card networks, digital dollars may first become useful by learning how to live inside them. And the emergence of stablecoin-funded cards creates another business layer of infrastructure providers that translate between blockchain-based balances and conventional payments systems.