I think the best altcoins to invest to this year are ethereum, litecoin, and NEO. Ethereum is known to be the second most valuable cryptocurrency after Bitcoin. In addition, it also has a current market capitalization of $64.35 billion. Litecoin, on the other hand, is a digital currency like bitcoin which was launched to overcome the shortcomings of bitcoin, giving its buyers a faster transaction speed. Lastly, NEO is the most known crypto in China. It is also is a platform like Ethereum which is designed for developing Decentralized applications (Dapps), Smart contracts and ICOs.