I would definitely recommend mining ethereum. The coin holds good value, the future is bright and I think you will be happy with the results whether you are choosing to sell it or to hold it. I have been mining ethereum for a few months and have been holding all of mine, as I feel comfortable that this coin will continue to rise steadily in value.
I'm new to mining so it's really knowledgeable reading here. Me and my friends are planning to build a Solar PV based mining rig because the power supply in our area is not consistent, we are planning to mine etherium this fall and I hoping the will be able to compensate for our expenses and have a positive return at the end of fall of 2018.
As for me I'm holding all my ether too and it's really good to play in the market.