You know whats used way more then crypto to buy illegal things and launder money? Cash
Actually, I was flagged over $6000 deposit over the sale of a car.
The IRS gives rewards to bank employees if they report (successful conviction) any suspicious behavior.
I still don't know why I was flaggged. Probally because I had long hair at the time?
I had a bunch of sleepless nights over that incident, and a bunch of emails back and forth.