Yes, holding ethereumm is always a good option in the long term due to the current market situation. We are seeing there are many active development activities will release from this coin makes many people will still have opted to hold it tightly.
Well Ethereum is one best currency to keep holding,yeah there are some chances that this coin once make its move towards highest value of 15 hundred dollars.
Better to hold it, unless you have another altcoin that has the potential to develop properly. Ethereum is a good coin that continues to grow and already has a very good ecosystem, so it would be better if you hold it. but I suggest you not to put all your investments in one place.
This is diversification mate,holding other altcoin or even bitcoin aside from Ethereum because it is not a best strategy to put your money in single investment.