LTC is just a pump n dump coin. It has no worldwide acceptance like btc has. the market of ltc is very small & normally merchants don't accept it. the development team of ltc doesn't give any unique project for a long time. there is less discussion about it.
You are right. I was thinking the same, but I also think about the halving come soon. I don't have as much Litecoin as do you, so since my Litecoin has lost so much value, I think I might wait to see what happens.
Why would you sell your litecoin after a 1.5 year decline in price vs bitcoin? That is just screaming "Too late, better wait for a better opportunity!!".
Because we thought the decline will end and it never came until now

could we say that the litecoin pump is just temporary do to the halving ? maybe a pump group trying to have leverage from their accumulation vs what is coming to play now.
In my opinion, halving has everything to do with it. It's sheer speculation.