Litecoin is the cheaper version of Bitcoin, potentially a good successor in case the dominant cryptocurrency will be gone. Litecoin considerably has some advantages over bitcoin considering its 84 million supply and faster in terms transaction compare to Bitcoin. It may not pass Bitcoins dominance but it will be more established than any other coins in the market.
When the altcoins “Golden age” comes, Litecoin will jump high. This is still one of the best alts of all the time, although the project is pretty old. I have LTC in my portfolio, but now, I use it mostly for trading. Litecoin is presented on almost all exchanges.
Litecoin has established itself in the cryptocurrency market and we can certainly call it one of the most stable coins. However, I am sure it will never become stronger than Bitcoin. I think that Ethereum has a much greater chance of becoming a market leader, as it introduces a different form of transactions, which may be more practical in the future. Litcoin "otherness" is simply too small and because of it will never be more popular than Bitcoin.