It seems to me that this is still speculation based on the idea that increased exposure will increase investment in it which will drive the price higher to punters buy up LTC anticipating that it'll rise and thus it self-fulfils. I don't really see what fundamentals have changed to spur such a climb.
Last year, litecoin was stilll "the first altcoin historically, which is just a duplicate of bitcoin and is mostly unmaintained". This year, it suddenly became bitcoin's staging area.
For those not aware, there's an ongoing heated debate in bitcoin about scalability issues that just seems to be unable to find consensus between several concurrent solution propositions. Litecoin came and implemented one, so we now can see how it performs. They are now moving on to implement lightning network, which is an other feature proposed for bitcoin for a long time. That being said, it will stop being "bitcoin's staging area" the minute bitcoin will go with an other choice that the one that was tested in litecoin. What litecoin would do? I don't see it asking miners to rollback a feature.
There's an other fundamental to consider : as for now, litecoin is more scalable than bitcoin. This means that should bitcoin fail spectacularly because of its scaling problems, litecoin would be the safe replacement choice, as it's exactly the same thing, but without scalability issues - due to mentioned features recent add. It would be a bit sad not to replace bitcoin with a more modern coin, like ethereum, but that's still something that could make litecoin relevant.