Cardano (ADA) — new smart contracts platform (coded in Haskell) a with a scientific approach and excellent team (Ethereum co-founder and the Haskell language designer). The product is to be released in 2020.
ICON (ICX) — one of the most undervalued dApp platform. These guys have one key advantage: ICON has an access to the closed South Korean market. ICON Mainnet officially launched on January 24, 2018
Walton (WTC) — focused on RFID IoT integration with blockchain. The most promising attempts to provide a combination of hardware devices and blockchain so far. Totally undervalued.
Bytecoin (BCN) — Bytecoin is a cryptocurrency with untraceable transactions. The project was started in 2012 and already proved that it can be trusted. Their 2018 roadmap is promising and has many cool marketing stages.
Dogecoin (DOGE) — Dogecoin has a huge and friendly community. The coin itself stay cool even when the whole cryptocurrency market is dying. Consider keeping a part of your investments in DOGE. You won't regret that.