Let's hope not but this seemed just a big pump and dump on the hype of SegWit implementation. It would be really bad for LTC if this was only a way for the big pools and holders to get rid of their litecoins.
I doubt that SegWit had anything to do with the initial price climb - that appears to be all about "capitol flight out of BTC into the alt-coins" like the recent price rise in ALL major alt-coins.
The "settle down" since then though might be having SegWit support, as LTC seems to have dropped less than most since BTC pricing recovered (which appears to be due to BU support dropping noticeably since AntPool/Hashnest went fully-in on BU support).
Coinbase does NOT accept LTC at this point, though it appears they might plan to add LTC sometime soon.