LTC is actually one of the few 'genuinely good' coins IMO, if you are the long term investor then definitely hold, but if you want to make a quick profit then you should probably sell on 19th, it's being pumped right now (currently $45) and going too high too soon almost always signals it will drop significantly, even if not all the way back to pre-pump prices.

Well, the hype is because of this

https://twitter.com/Bitstamp/status/875394226384769024

- Bitstamp