With mass adoption growing everyday, I think Litecoin to be valued at 5,000 by the end of 2018 is possible.
For me that was impossible to happen $5000 is too much for litecoin maybe $2k, that was possible for altcoins to hit, and litecoin can also rise but it will take too long, but i think in 2018 ethereum has a big chance to rise or increase very well it value maybe ethereum can hit $4k before 2018 will end.