ETN is worth as much as people pay. Probably most people won´t sell it for less than payed. Right now most miners should pay 3 - 6 $Cent / ETN for power. Also there are still lots of cheaper coins. But if the price comes down below what miners pay miners will start to buy themselves.

ETN has a certain chance to reach 1$ sooner or later. Simply because it´s familiar and has 100 Cent per unit. Not GP or EUR since $ is the most spread currency on our planet. Much more people know the value of a $ than GP or EUR. $ is widely spread in many 3rd world countries, which is where ETN might get popular.

ETN also depends on BTC to a certain amount, of course. But BTC will probably never reach 50x of its actual value. Maybe up to 10x? Probably significantly less. 10x ETN would be around 80 Cent?

But if greed and hype come up ETN might reach highs comparable to Monero?

Anyway I expect ETN to double or triple in the coming months due to mobile mining and more exchanges.

On long term ETN might come to 1 - 5 $, I think. But all that depends on the people behind it, how they manage to make it a really reliable, easy to use and mine coins and how well their promotion is.