It depends a lot on how long you can wait for your investment. But in a year or two I think ethereum will rise on more % than bitcoin because of obvious reasons. And most of them are about ICOs. Erc 20 makes a lot of new coins that can pump the Eth price over time.
I can't agree with you, as it still did not start to show any tremendous growth. Hardly ever investors would be interested in such a huge volatility of etherium by the end of the year.