Bitcoin have future thats for sure. I do believe that there will be some alts standing still not just LTC and ETH but these as well: DASH, DOGE, XMR, ZCASH

There will be more of them. But the point is and will stay prob most of the alts will exist in the future for the people to gamble upon, to create fake value. We all know that most of them were made for profit and nothing else.