I think you should keep Ethereum, now prices are falling deeply and ICO is almost dead but in the future everything will stabilize again. You just have to keep the penny and wait patiently when the market recovers. If I sell penny now I'm sure you will regret it. This is my honest advice, good luck to you.
I agree with you, when the price drops like now it becomes the best opportunity to buy, I'm optimistic that the end of the ethereum price can reach at least $ 800 or 4x from the current price.