And how do you know that the price will drop to the 80's or 90's levels? it is impossible to know that.
And how do you know that it is going to be over $120 or $150 by next year? Are you a magician?
Buy some LTC whenever it goes down to 90' or 80's, the coin is promising to have an stable price in between 120/150 after this year.
Do whatever you want, if you want to buy litecoin, then buy it, it is one of the best altcoins that are now listed on the market.
The same applies to IOTA and Ethereum, they are probably the most promising altcoins that we are going to have during the next year.
Monero is a good coin too, but i would not put more than three thousand dollars in this, nobody knows if it can get stucked at some point just like it happened during this year on the first quarter.