If you have ability to hold some coin I believe that ETH will be more profitable from other. I know many alt coins are very low price now. But for me eth is better to hold a little bit. I believe you will never loss.
Holding Ethereum for a very long time does not mean that you can never loose. Investment is a risky venture, you can only measure your risk but you cannot predict what will happen in the future. Most undervalued coins are also very good to invest on.