The era of growth is expected in 2018, and the ICO will die.
7 Altcoins that you need to follow Special in Q2 - 2018.
1. OmiseGo (OMG): Wallet SDK + Plasma Speed
2. VeChain (VEN): Rebrand To VeChain Thor
3. LiteCoin (LTC): LitePay + LitePal
NEO (NEO): A Potential Lift On ICO + Upcoming ICOs + ONT Airdrop
5. Lisk (LSK): Released new wallet updates and they have 4 ICOs lined up.
6. Stellar (XLM): Lightning Network + Stripe Integration
Qtum: Partnerships and Upcoming Projects + New ICOs
The altcoin I keep long term until the end of 2018!
In the list above I see the most potential are 2 altcoins: NEO and VeChain.
I do not think Litecoin will thrive in 2018. There are only a few writings on the evolution of Litecoin but it is not convincing enough for me. NEO will be the most developed altcoin in 2018. Now ONT is developing on the basis of NEO and in the future there will be many other altcoins based on NEO's technology.