someone told me that bitcoin in the united states which is either bought or sold is tracked as required by law

a gentleman who is in the money transfer business told me this, I am not privy to any secret financial authority that monitors hacked activity, however, all bitcoins brought/sold in the United States are tracked (as required by law) by all the legal exchanges and/or companies dealing in bitcoin. What inferences they (the law enforcement authorities) can get out of it, is anyone’s guess. what is he talking about? rsvp.

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