My 3 big picks are ARK, Iconomi and Rentberry here's why:

ARK: Ark is a blockchain that will bridge all other chains. They have a solid blockchain developers team who are active on github and who are clearly pushing through goals within their roadmap at a good speed. They are dpos so if anyone votes with their ARK they receive free ARK just for holding. Ark has a great community and is always adding to it. http://ark.io

Iconomi: Iconomi is more like a security coin because each coin is representative as a piece of the company. They are a crypto hedge fund with baskets of various coins being held in their platform which users can purchase on their exchange. Iconomi also burns their total supply with a portion of their profits, so there will be less and less coins in existence. http://iconomi.com

Rentberry: Rentberry is the best utility token of 2018 because it gives you access to an entire ecosystem within a platform that already is a working product. Their token is way undervalued right now at only .05. This one shows the biggest opportunity for growth because of the team, the token use, and the way they will helping to unfreeze $500 billion of security deposit assets across the globe. This company really is positioning itself to be a disruptive innovator in the giant real estate market. The Rentberry team is active in telegram as well as in their user support. http://rentberry.com