you can say: "LTC exploded" only when ratio to BTC will be more than 0.03. Current rise is normal for LTC since 2014 and touches few times 0,025ratio in this time

yeah, LTC will get back to 0.1 ratio with BTC in next few weeks.

Biggest problem with LTC is lack of promotion.
Steam dumps BTC support because of big payment commission and slow transactions. Litecoin can handle 10x more transactions per second than BTC, fees are also smaller, but nobody knows this facts.
Also payment processors for BTC are easy to remake to use LTC.

AS 3 years HODLER of LTC from 2014 to now I still believe that LTC will rise in 2018.
And this time we only see big rise of BTC, but others coins don't rise because big fishes are focused at BTC now. Altcoins will rise when raid at BTC will over, after 18th DEC probably.