Note- It's not a financial advice. All views are based on my own research
1. Litecoin -(LTC)
Its a currency based on peer to peer technology. I believe in the technology and I think it will touch high this year.
Let's take a look at the 1 month chart which I have taken from coinmarketcap. Here you can see LTC was high at 374 USD and right now its at 237 USD. As the peer to peer payments are increasing, I believe that it will go high and touch 400 USD. Its the right time to invest in LTC.
2. Zcash - (ZEC)
This is a currency which is a implementation of Zerocash protocol. Based on Bitcoin's code, it intends to offer a far higher standard of privacy through a sophisticated zero-knowledge proving scheme that preserves confidentiality of transaction metadata. Its very low supply coin and its high right now. It will touch thousand of dollars. Read more about it here.
Let's take a look at 1 month chart here which I have taken from coinmarketcap. Its an almost ascending graph, got a spike in between but now recorrecting itself. I believe after correction it will go up.
3. Ripple -(XRP)
This currency is based on real time global payments. Its been dipping from a long time. It’s perfect time to buy or wait for few hours or a day or two. For reference check the below graph which I have taken from coinmarketcap.
4. Bitcoin cash - (BCH)
This currency follows bitcoin. Bitcoin is low now so as this currency and its the prefect time to buy. Fore reference check the below graph which I have taken from coinmarketcap.
5. Stellar - (XLM)
This currency aims to help facilitate payments between people. It is a counter to ripple. It follows more of a bottoms up approach. It hit 90 cents and now its 54 cents. It’s a good buy. For reference check the below graph which I have taken from coinmarketcap
People talking about Tron and Verge as well but I am not sure about them that's why didn't wrote. I hope that 2018 will be a great year for Altcoins.