Litecoin is considered as the silver to bitcoin's gold and has massive potential in the future. The coin currently has a market captial of $5 billion and can cross the $400 marl easily by the end of 2018. The coin has been accepted by Coinbase, which has increased its market capital a lot.
In the future, the coin with its blockchain of 2.5 minutes will make transactions much more speedier and secure. Segwit activation has helped a lot with that. It is a good coin and one can expect good returns from it.