My very first thoughts all the way were putting my fresh investment in BTC..but lately i was convinced by the rates, that ETH is the best option right now.
Maybe thats only short term rising, but i go 100% ETH now and if it stops rising i will trade 40% back to BTC and wait how things turn out the next months with 60/40.
I know thats quite unpopular..but i did my research and i will take this risk. =)
If you got enough time on a daily basis to check the trends, new infos and charts, ETH might be a really good thing for investment.
After all of that said..i really think that ETH will rise heavily in long term.
It will not overtake BTC, but it will close up to 10-20% of the BTC price and stay there for some time.