The only place I think altcoins has a future in is gambling, normal gambling but first and foremost e-betting.I can not see how it will take over from normal currency's in the world of buying or selling any other goods then btc. The main reason I think this is that nobody wants to be that guy that bought two pizzas for 10000 btc 5 years from now, so i cant really see what else it has a real future in. But that is only my opinion, What do you guys think?
Maybe those altcoins can use also to buy goods in the future like ether no can one say about the future of ether because we know that this coins have potentials and have a market. So maybe not only in gambling we can used some altcoins we can use it also for online buying. That is my thought about some altcoins.