If Ethereum was called scam, then most of the coins out there were scams for sure.
Ethereum is the most important infrastructure cryptocurrency so far. Lots of applications are based on it.
Ethereum will never be scam, i know that ethereum is one of the strongest coins right now and i also know that a lot of investor is really trusting eth because they are becaming profitable with ethereum and the future of it is have a big chance to have a higher price.