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!
the struggle for the title of the most important crypto currency is led by many different camps. The leaders of this race are Bitcoin and the Etherium, and both have serious support. However, this is only a very early stage of the industry development. I do not get tired of reminding that crypto-currencies, in fact, are still only at the stage of the experiment, and the finish of this race is still very distant.