I think bitcoin digital currency is best at this time. bitcoin has had enormous support in world financial markets.
even today bitcoin will continue to grow until won the trust of the government of a country.
I agree that bitcoin is on top of the best cryptocurrencies and its growth is unstoppable and fast, but I don't think it has enormous support in the financial world. Because if it really were highly promoted and widely used in the economic world, the governments would have accepted it and let their people use it instead of banning it like in some countries nowaday.