code: def not_supported_currencies(self, project='moneywagon', level="full"):
          
          supported = self.supported_currencies(project, level)
          ret = []
          for symbol, data in self.sorted_crypto_data:
              if symbol == '': # template
                  continue
              if symbol not in supported:
                  ret.append(symbol)
          return ret
docs: Returns a list of all currencies that are defined in moneywagon, by not
          supported by the passed in project and support level. Support level can
          be: "block", "transaction", "address" or "full".