It really changed cryptocurrency because it is the first cryptocurrency that implement smart contract that can make a token on top of Ethereum. It is an enhance version of bitcoin and others are also following the footsteps of Ethereum.
Yes, Ethereum is the part of the changes of crypto world and it is one of the reason why cryptocurrency is become popular because of what happen last to it's value. Also because of this crypto plenty people are now are more interested to buy or get involved in crypto world. And also not only Ethereum is the reason why, because there's plenty of altcoin are also part of the changing world of cryptocurrency especially the great coin and best of all the Bitcoin.