**Headline prediction (testable):** the digital economy should exhibit (i) lower baseline trust, (ii) higher endemic deception, and (iii) *larger-amplitude, less-damped* fraud cycles than the pre-digital economy. Crypto — with $\phi\to$ low, $\delta\to$ low, no institutional $r$ — is the model's *limiting case*: $\mathcal R_0 \gg 1$, $T^*\to$ small, near-undamped cycles. That the model retrodicts crypto's observed pump-dump periodicity without special pleading is strong corroboration.