So after ethereum prove it self to be the most successfull alt coin, you still asking this question ? Ethereum is the best alt coin for now. With it smart contract people using it for ico and the project 9n top of its blockchain most of them is success..ethereum has changed crypto world..
Is it success ? Yes...it is !!!
yes i agree ethereum has changed the crypto world,
because now a lot of ico and projects that produce coin associated with ethereum