Zilliqua is hot. Electroneum too is a giant waiting to be awaked. It too can be a good investment.
For direct competitor of Ethereum, NEM and EOS are good investment. And if you are into regular income, invest in exchange coins.
I highly recommend investing in Ripple with Ethereum. the ability of the development of these two coins is very capable to rely on it as the main coin is supported to have a much more advanced development in the future. thus making Ripple and Ethereum a coin capable of becoming a reliable coin.