DOGE is still breathing because of its enormous community and it is a living proof that cryptocurrencies does not need gimmicks to succeed. Only a troll can say that Litecoin is feeling threatened by some other coin/asset/token. Even if LTC completely dies, it will still be one of the best, because for one simple reason - it distances itself from the "tech race" and focuses on adoption. If Litecoin dies it would not be, because it was "not developed" (from the tech side), it will be because of the people's hypocrisy.
EDIT:
It may die, because people are for the "coin of the day" and cares about their $5 profits. I've said that more times than a 60-year old priest said "Amen".
But litecoin is not bitcoin. Even if bitcoin lacks certain technologies and features other altcoins and platforms have it was the first cryptocurrency and it may be cliche to say this but it has first mover advantage over the rest. Remember during the early years it was litecoin that started a sort of "gimmicks race" by making confirmation times faster and adding more in the total coin supply. Not even being the faster coin could make it surpass bitcoin. So maybe a new approach is to be taken and take the gimmicks race a step further. With litecoin's current infrastructure I believe it can take Ethereum a run for their money and get back to 2nd place.