the price of bitcoin is rising probably because of litecoin too, because some people can't buy litecoin directly, but they can buy bitcoin directly, so they buy bitcoin first, which mean pumping it, and then exchange for litecoin
that's pure speculation. but certainly not impossible. people can also just deposit fiat into their exchange account and then buy litecoin.
not really, i know it is true, because it happened with doge also, when it was pumped like no tomorrow, many are not holding altcoin anymore, but if they see a pump like that they want to jump in, and to do is as fast as possible, they need to buy bitcoin, wich is much more accepted than litecoin
and this make the entire proccees of buying litecoin more easy