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!
Ethereum is good cryptocurrency after bitcoin. Ethereum value is also consider good for investment. Ethereum is accepted by many multimillion companies for their business and for various projects so these thing help to boost up its price. Ethereum is a growing currency according to many investors it is the future currency and it price is also less volatile then that of other cryptocurrency and because of this many people wants to invest in it. Another reason is Ethereum accept by many country and multinational companies which increase its intrensic value and industrial value. Its price is also comparable with gold so it is perfect for investment.