look around you and compare LTC with other altcoins, also compare their team and you will understand.

if that was not enough you can simply take a look at the history of litecoin and its performance during last years and also compare it with bitcoin and see how LTC move with BTC. as bitcoin rises litecoin goes up with it.

and even if the nice charts were not enough for you, just look at the market reaction. the fact that there are a lot of people interested in it and are investing shows a nice buy support and demand which is increasing the price.