The trouble with moving big amounts of cash, from a criminal’s point of view, is threefold. It’s bulky, it’s heavy and it smells.
A stash of $1 million in mixed bills weighs around 100 pounds (50 kilos). Specially-trained dogs can sniff out bulk cash in a heartbeat.
All of which helps to explain why drug cartels and financiers of terrorism appear to have been making increasing use of what FBI chief Robert Mueller calls a shadow banking system.
Its features include a legal loophole that allows money launderers to get around the requirement that cash or “monetary instruments” (share certificates, travellers’ cheques, money orders etc.) in excess of $10,000 must be declared on entering or leaving the United States.
It is, however, perfectly legal to carry, say, $50,000 embedded in the magnetic stripes of so-called pre-paid stored-value cards.