This can be seen as an option because indeed most of the new projects are based on the etherium platform, but now new projects are beginning to use new platforms to at least be different from the previous one!
As soon as it is used in more than 93-95% of ICOs, you can call it the King in this sphere. Additionally, it is also the leader of the altcoins. Ethereum smart contracts are extremely popular. Thus, I hold ETH.