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?
Altcoins are good alternatives for e-commerce too. Some altcoins such as XRP are good coin for instant transactions. It processed faster than Bitcoin and charges lower fee. The main reason why people would prefer Bitcoin still is because of its integrity, security, and volume of its holders/traders.
A lot of other altcoins have technology superior to Bitcoin but the result is very much dependent on the value of this coin to increase prices. I think Bitcoin can still do all the work that investors need but it is best to see this coin as profitable asset because Bitcoin transaction speed is very slow. Currently Ripple, Litecoin, Stellar will be more suitable if you choose to pay because these are very good options for everyone.
However, the most important thing is profit and if not careful, you will have huge losses in investment. Transactions or payments are secondary and will not be used much in investment.