This estimate is especially interesting because of the methodology. It's well worth a read.

In other words, more than a third of all US currency in circulation is used by criminals and tax cheats.

https://www.aier.org/article/how-much-cash-is-used-by-criminals-and-tax-cheats/

charts_and_numbers

Chainalysis Estimates 0.34% of On-Chain Crypto Activity is Illicit

This estimate is especially interesting because of the methodology. It's well worth a read.

2017
> In other words, more than a third of all US currency in circulation is used by criminals and tax cheats.
>
> https://www.aier.org/article/how-much-cash-is-used-by-criminals-and-tax-cheats/