It's hard to speculate we can only get the true picture if we can solve these scamming by using Ethereum platform, and the too many hacking that is happening in big exchanges, if people can transact safely and people are educated on how to safeguard their coins and trade effectively then we can expect a good price for Ethereum probably $4000.
Projects operate on Ethereum platform or non-Ethereum platform, they all can be scam projects. That depends on their team, not platforms on which their blockchains operate. The key point for the coming growth of Ethereum is itself, and its promised upgrade, that delayed from time to time.