Etherium is widely using crypto currency  in crypto sphere. more than 2 years it kept it's position as number 2 in coinmarketcap. but after the huge bear market in 2018 it moved to number 3 position.
But it is still most usable crypto in the world. due to it is first smart contract used crypto,lot of ple used it to generate Crypto Tokens called ERC20 and ERC220