imo these are the 2018 coins :

NEO : This one is just starting his run to top 5 marketcap . in my opinion the safest and best coin for 2018. More and more ico's will come to this platform.
IOTA : A no brainer imo. The question is not IF it will moooon , but WHEN it will moooon ;-)
SUB : Just do your homework. Big things coming !
DGB : Digibyte is the fastest,  longest and most secure blockchain ! This one will be big in 2018 !
NAV : Their navpay app is working very well ! And it's one of the best privacy coins.
Deeponion : It's the year of privacy coins ;-) . Has a good dev team . Looking forward for a massive run

My next buy is ITC ;-)

Just my opinion . Do your own research , but these are worth a look... just saying ;-)