My advise: buy Axpire, Ethos and Oyster Pearl. These coins are my top picks for 2018.
Axpire is under presale price but they already got some of there dev. goals reached. They got a big and great team + advisors and they are already a working company in this field. they just add blockchain into their buisness. They will not change the world but they can be a "small" SAP competitor.

Ethos will release their all in one wallet and marketplattform in march. Fiat gateway coming soon too. They want to make cryptos useable for everyone. Like a Amazon for cryptos + they give you a wallet where you can store many many many coins without saving your privatekeys. They will bring cryptos to the masses.

Oyster Pearl: IOTA + Ethereum tech. what shall i say more? 1:1 Airdrop coming soon in April. I expect x2-5 until this and much more until December.