Litecoin is interesting right now. It has activated Segwit and its creator Charlie Lee who has worked at Coinbase for years has quit to concentrate on Litecoin. I see lightning network and RSK being implemented in the near future. They don't have the political bullshit that bitcoin has right now and are free to innovate. Bitcoin is like a digital gold, its a store of value. Still cheaper to send cross boarders than gold. Litecoin right now has the advantage of a low cost medium of exchange. I would say it makes a great digital currency but I don't think it will ever takeover market cap in the crypto space.
Well, the best thing about litecoin is that it does not need to take over bitcoin in market cap, if it did it will become like bitcoin with all the political issues and that stuff, litecoin just needs to be there and keep being useful and that will be enough for litecoin not only to survive but to thrive in the ruthless market competition of crypto currencies.