Ethereum is less volatile than other cryptocurrencies. A lot of ICO projects create ERC20 tokens and use ETH blockchain for smart-contracts. While the situation will be the same, price will keep stable. But when some another blockchain networks will be using for ICO, ETH price can quickly drop!
Eventhough for that aspect you have know ethereum will be more good than others for me, because ethereum is one of the most common alt for now that has a 2nd value of the bitcoin.we can say that every alt has its own negative overview but in total it would be ethereum good to invest as its still making progress for tomorrows come.