Why most new tokens are Ethereum?
Liquidity Ethereum is the 2nd largest Blockchain network in the world. Every token built on the Blockchain demands for Ether and liquidity to the network.
Scalability The founder of the Ethereum, Vitalik Buterin along with his team working together to implement Casper that aims to make transactions more efficient.
In addition the feature of smart contract where enable flexibility to developers to make DApps easily.