In the AI era, the logic of sound money remains unchanged. It simply evolves from “money suited for human use” to “money suited for both humans and machine networks.” The foundation stays the same: scarcity, resistance to arbitrary manipulation, reliable settlement, and long-term purchasing power. What changes is the upper layer: it must become more programmable, frictionless, censorship-resistant, and natively compatible with the agent economy. Sound money + machine-native rails will form the more complete new standard.