ATM's are owned by private banks. Banks are obligated to keep a customer's account credentials and transfers private, and accessible to only him.
Exactly,its private afterall, but BTC is 10x more private than a normal bank account since BTC doesn't keep/ask for your personal info as much as bank requires.
And when I say 'x' amount of $ withdrawn from ATM (btc), it doesn't mean you gotta bear a bank account/ATM card but it all works with one simple tiny QR code aka
Paper wallet which is still private for 2nd person.
There are many countries where they doesn't question about the number of $ you have, for example UAE (Dubai) would never bother if you got trillions more than the country's asset
So it is very simple to launder money from your BTC (if its illegal in your country) to hard cash by flaming your government with the help of '
BTC ATM--->Deliver cash via Hawala to(google it)----->Country where they doesn't have tax(like UAE) and then the competition is over.
A smuggling business always work under strict master plans since it is not VCMP $
Another style of laundering cash withdrawn from BTC are by Casino gambling, investing in a business and take share, donating to a charity(These steps are played with the knowledge of the inside people so that smuggler get his money as white money) Then which government have got rights to question him?
It's possible to track by number, especially if you got it from ATM. But I think you not got the point.
It doesn't make any sense if the value of $ is less, and no fool is gonna spend the same currency if the amount of withdrawn $ is too high
P.S: The most notorious BTC gambler is a Russian whose annual income is 11 billion USD.