In modern finance, Medium of Exchange and Store of Value have structurally diverged. Design choices constrain outcomes. Cryptoassets with inelastic supply, such as Bitcoin and Zcash, are bound to function as Store of Value and not Medium of Exchange.

Cashu eCash reintroduces digital bearer money on Bitcoin, enabling private, instant transactions while opening the door to credit and financial innovation. The system offers a new frontier for Bitcoin payments, shaped by market dynamics and user-driven solutions.