For me in my personal recommendation, the best Altcoin in the future are billion coin supply Altcoins like Ripple, Reddcoin, Dogecoin Stellar, Tron, Stronghands etc.
Because they could give people freedom to get even a single coin because they're almost cheaper than million coin supply Altcoins.
In my home town, some Cafe and restaurants started accepting Ripple and Dogecoin as another mode of payment for their items and foods because these two coins are both fast and accessible.