that is how Al Capone was taken down, isn't it? That is the reason government pushes you to use banks by in particular attacking even very modest cash piles. And you do have that $10K bank transaction limit triggering law enforcement check.
Even the Joker wont take on the IRS.
Even the stuff which is from criminal activity.
https://www.irs.gov/publications/p17
That is, presumably, someone else's problem if you report money received from money laundering or bribes.
So when we legalized marijuana, most of the possible infractions have sentences up to 14 years and that’s no coincidence.
Bringing marijuana across a border? Up to 14 years!
Making an extract? Up to 14 years!
Sharing with a minor? Up to 14 years!
(vs actually triggering any sort of law enforcement check on that particular transaction)
"FINTRAC analyzes approximately 19 million transactions per year. In 2017, FINTRAC made 2,000 disclosures to police forces." according to Wikipedia.