Good luck using one though in Brazil or Vietnam - they're illiquid relative to euros or dollars and therefore harder to launder. "widely used currencies" can b

Good luck using one though in Brazil or Vietnam - they're illiquid relative to euros or dollars and therefore harder to launder. "widely used currencies" can be read as "usd, eur, jpy, cny, gbp, cad", although chf is up there it seems.