If I'm not mistaken, MCO is the native cryptocurrency, backed by BTC (or US dollars.) There are several of these tokens out there i.e. Tenx, Monaco etc...Wouldn't be able to tell you which one is more "reliable" though. Usually once these cards are issued there is a pullback from Visa or Mastercard over a paperwork issue and the cards get delayed....This has been the experience for most of these companies in recent past.