It's so easy to make one, does it make sense? But think about it, Bitcoin and Litecoin are the same thing.
Some altcoins serve a direct purpose. I can see a future for LTC as being used for microtransactions and even Doge is good for it. The only down side is that Dogecoin is now crashed in price so it makes people scared to use it. Maybe if it is stable for awhile we will see some good results. BTC costs too much for transaction fee of .0001 to use for micro transactions.