Monero, Dash, Verge and Electroneum Market caps...already high for a new bull run. I won't invest here, unless you invest HUGE.

ZCash and Zcash...nice..but old technologies when compared to other privacy coins.

Pivx, Nav nice projects, I like both

SumoKoin is a interesting poject fork from Monero. Great privacy, strong security and true fungibility (act like a digital cash).

DeepOnion and Spectre both tor based nice project

My Pick for 2018 is DeepOnion
#1 TOR based anonymous cryptocurrency with future DeepSend technology implementation
#2 Vote Central. Community has full inclusion in all decisions.
#3 Low total supply..it means HIGH growth potential.
#4 Best Community and marketing team
#5 Strong obfuscation OBFS4 with MEEK and Stealth addresses
#6 Great White Paper depicts the Bright Future of Onion