looks like cash has solved (most) of this some time ago: - V. costs nothing to exchange a bill - V. link to a real economy so little volatility (except when t

looks like cash has solved (most) of this some time ago: - V. costs nothing to exchange a bill - V. link to a real economy so little volatility (except when the real economy implodes) - V. accepted everywhere within a currency zone - V. mostly secure (ofcourse theft is as old as humanity) - V. private (only your counterparty knows about it) - V. fully integrated into financial accounts / tax systems - X. fast (local) transactions but remote remittances outside a currency zone a serious problem (expensive, slow) - V. counterfeit tech very sophisticated - V. you can print as much as you want The major flaw of cash is actually linked more to the international system of currencies (which underlies many more socioeconomic problems)