Any crypto currency is a world digital currency, since its scope is not limited to one state. As for the ripple coin, it is a common coin created to serve the banking system, although it has good functionality. From the point of view of the crypto currency, this coin has a very big drawback, since it is completely centralized. Therefore, ripple by its nature can not be on a par with all decentralized crypto-currencies, and therefore its future is in great doubt.

That is a joke if you think that ripple is the future currency because ripple is centralized and it is controllable by the banks and that is the reason why ripple will never become the currency of the future because people will prefer the decentralized cryptocurrencies because they want freedom and they don't want to get controlled by the government or even the banks.

@Halsrethink

Cashless society is coming, albeit slowly. Govts will not permit cryptocurrencies to take central role, will cripple or ban them, Instead impose their own cryptocurrency w/single, consolidated ledger