US currency (paper money) that circulates in Fort Lauderdale, Florida and south to Miami has the highest traces of cocaine in the world.
Possession of cocaine requires actual possession, knowledge and control. If you hold on too tight to your money you cannot be convicted of possession.
Former President George Bush (the senior) once produced a ten dollar bill that tested positive for cocaine. Of course he was in Miami when it happened.
You cannot get “high” from paper currency in Fort Lauderdale, but you can still spend it at the beach for a beer.