def not_supported_currencies(self, project='moneywagon', level="full"):
        """
        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".
        """
        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
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".