Digital cash has great utility, but decentralization of digital cash has marginal utility over centralized alternatives. In particular, physical cash is centralized and is just as useful as decentralized fiat.
I'm not against centralization. At least for smaller purchases, I do like some of the privacy elements of some digital cash solutions. It sometimes feels like the temptation with centralized solutions given storage is cheap and the fraud and other arguments are strong is to avoid any privacy elements at all.
