Sam Banman-Fried (left) image by ED JONES / Contributor/Getty Images. Mackerel image (right) image by Anadolu / Contributor/Getty Images
- Sam Bankman-Fried quickly figured out that mackerel fish is the currency of choice among inmates.
- He recently used it to pay for a haircut.
- The food item has been a popular means of exchane in federal prisons since 2004.
It didn't take long for former crypto-billionaire Sam Bankman-Fried to learn the economic system of New York's Metropolitan Detention Center.