If Mozilla’s more welcoming policy is emulated, and one hopes it is, it offers stablecoin issuers a window. But this window comes at a price. If stablecoins are ever going to compete in a meaningful way with the card networks, they need to dissociate themselves from proof-of-work. That may mean avoiding expansion to proof-of-work blockchains. At the worst, it means helplessly waiting while the proof-of-work chains on which they already exist, like Ethereum, switch over to less energy intensive security methods.