I have not figured out for this absolute sudden surge in litecoin and even some in the community are equally clueless. Only guess so far is that lot of people have joined coinbase and they saw litecoin and for some reason decided to join the bandwagon.
Fortunately/ Unfortunately, I think that is also the reason for ETH going up. I would like ETH to go up more for it tech abilities and more usability but will take what I can get.
For now, everyone who ha stake in crypto, enjoy all the gains and keep on profit booking once in a while :-)
As of this post-Litecoin is 230$ +, Ether is 520$+ , Bitcoin is 16.8k$ +