I think you should buy etherium because many ico always use Etherium platform. When viewed Etherium is one of the best Altcoin that always stays beside bitcoin because of the complex etherium function.
Yes. Most of the developing tokens are based on the Etherum blockchain. That is the advantage that ETH has on the market, But in my opinion ETH prices will increase in the future, but not high. There are too many coins to compete with ETH and BTC.