Barbados-based Bitt a portfolio company of Overstock.com blockchain subsidiary Medici VenturesSALT LAKE CITY, 2018-Feb-28 — /EPR Retail News/ — Overstock.com, Inc. (NASDAQ:OSTK) portfolio investment company Bitt.com has signed a memorandum of understanding with the Caribbean island Montserrat to launch a digital payments platform. Bitt has been working to position island nations in that region as global leaders in the adoption of digital national currencies,…