Let's say you mixed your coins successfully and send them to a private wallet no one knows and never been used since. So it got out of the exchange as the last traceable link to it. I was just thinking if the IRS will ask you what happen to your coins that got out of the exchange?
What would you say to the IRS who will visit you to ask these data personally?
This is the same thing I was thinking. You have currency in an account registered to you and it vanishes without a trace. I would think that would raise a red flag.