Well, if you get Sats/Bitcoin’s that were, or possibly affiliated with a Drug transaction, unlicensed firearm sell, CSAM/Child P*rn, or a hit job the KYC ramps, and middle men like Bitpay, Coinbase ...
Fiat's Achilles heel: traceability. 1933 Executive Order 6102 seized gold, now digital assets face similar scrutiny, undermining alleged anonymity.