Investing in Ethereum is risky, but it could potentially be lucrative. Unlike Bitcoin or Litecoin, companies are really using Ethereum as a building block - something more akin to diamonds than gold. As an investor, this is a potential win. You have to be patient and study very hard before investing a your money.
It's important to remember that Ether (ETH) is a currency, and should be treated as such by investors. You don't buy shares of Ether like you would stocks or ETFs. Instead, you are exchanging your dollars for Ether tokens. There are no dividends, no payouts. Your only hope is that in the future, other people on the Internet will pay you more for your tokens than you bought them for.