I concur with you. Only altcoins which have real uses in our society will most likely survive for quite a long time. But those which are abandoned by developers and have no real purpose in life, are considered "shitcoins" and will not last in the future. In my opinion, I think that Ethereum, Ripple, Litecoin, and Dogecoin will have the most probability of surviving in the future than other altcoins we know of today.

That is simply because they've been tried and tested over time and have gathered a lot of popularity between crypto-enthusiasts and ordinary people. Also, a few masternode coins like Dash, MonetaryUnit, and PIVX will survive too since they will always be demanded by people, for the simple reason of making a side income out of such coins.

But in the end, an altcoin will survive if it could keep up with the latest trends in technology, innovation, and most of all, active development. Hopefully, many altcoins could survive alongside Bitcoin for quite a long time.