EOS definitely has a lot of room to grow in 2018 because of the fact that it started the year is an extremely bullish fashion. Also main net launch is coming extremely soon, which is going to generate a lot of hype.

$100 could be possible, since it's only 5x and crypto markets are volatile, but not likely.

I'd say that $40 as an ATH seems more plausible to me, and if you want to buy, you might want to hurry up since main net is scheduled to launch next month.