You are using the wrong denominator. You need to compare the percentage of cash transactions (or cash exchanged) for illegal activities compared to crypto.
If you start moving more than $10,000, you will have IRS attention. (I think they like to pick on little guys because it's easier than the guys whom have lawyers, and CPAs?)
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.
I hope we wouldn't have to go through a bunch of sleepless nights for doing nothing bad. There are semi random checks of "suspicious behaviour" being done in masses. These things can get out of hand sometimes (redefining what suspicious is...), when those elected get a bit crazy