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.
No need to sell Ethereum now. You will then lose your money. there are two options: maybe now everything is good, then it can be worse and not selling now you can lose. Maybe it'll come back and sell now you will lose the money that could make. later when everyone grows up!