For some reason, traders don't see the trouble BTC is in and mostly keep trading in BTC.
Traders determine the price, not miners or developers or people who use the coin.
I don't have much BTC anymore, only LTC. And if I would have much BTC I would surely switch (at least half of it) to LTC because I think BTC will lock up at some point.
And as LTC switches to segwit, LTC has a for more bright future than BTC.
So for me it's a big question why LTC is not going up right now...