Not just yet. Ethereum will not be gone easily. As far as I remember, ethereum is one ranked second, that's right next to the king, bitcoin. Ethereum is surely a good coin. I can say this because it has a good reputation, meaning  it is being noticed because of its usability and benefits. So I think dumping it now is not a good idea. Though we can't be sure what will happen next, this issue might not be enough to bring eth down. Ethereum has been here for a mean time and it is enough time to grow and mature.