Here's my prediction:
Within 2 years, ATH for bitcoin will exceed $7,500.
Within 2 years, Litecoin will trade below $10.
Why? Litecoin is an also ran. It offers nothing of value over bitcoin. Sure litecoin is a well run coin, gotta give them props for that, but it's not innovating... and the bitcoin space is already covered by bitcoin.
Ethereum, with all its problems, is at least trying to offer something different.
All lite coin offered was non-asic mining, and that has gone away.
It's looking like LTC will activate SegWit, which means they'll have Lightning!
BTC likely won't because there are two opposing camps that will never come to an agreement on how to scale.
Once LTC has something of unique value it will provide a huge boost in price, which is something miners, whales and blockstream ALL want. It will provide fast, cheap transactions on a coin with good reputation and liquidity in the top 10.