Both coins has really great potential, you can have them all together. But I have more of etherium than EOS, I believe that etherium have reached the point where it is still possible to be regain. The community of etherium also is bigger that EOS, which means only that it has good potential and have become as one of the most established coin. But still it is good to hold both, after all you can have them all in one wallet called Hodler which is the only fully open source multiwallet.