You could invest but don't expect that you would get your profit this year,
Maybe look for a long term investment in ICO look for an ICO with a nice road map and active community.
Ethereum is very cheap, although ICOs still use it. The price of the coins will not grow very fast, and the investors need to wait for the profit more than before. I would better deal with trading.
Of course, various ISO projects use Ethereum today. The only question is the quality of these most ISO. As for me, now there is a huge stream of scam.