Questions about Ethereum

Hello, i i have some eth, and i believe it will be the future for many applications, but lately im reading somethings on twitter.
I dont know if those are fake news or real.
Can some one explain me what is this "EthGate" , they talk about Ethereum is not decentralized and 75% of the supply is in hand of a few whales.

im not trolling, i really asking if someone can relax me..