Some of the best alts to invest in 2018 would be:
Litecoin, Ethereum
Both the coins are under the top ten cryptos in the financial market. They have gained wide acceptance in the financial market and have successfull projects behind them. Ethereum, not only just as an investment asset, can be used as a token for smart, decentralised applications. It can also be used as a platform for posting new ICOs. Ot can cross the $1500 mark by the end of 2018.
Litecoin with its blockchain of 2.5 minutes makes transactions much faster and it also has the potential to cross the $400 mark in the coming months.