Yes, you are right, instead of selling them in the market it is better to hold until the market starts recovering. Most of the people who are holding ETN are now selling because they are in panic mode whether the price of ETN will increase are not in the future?
Can you guarantee that it will increase? I keeping some altcoins of such level for years, and yes they bounced up at 2017/2018 period when all was up and profits was huge, but later...
I saw they progress - start is with serious devs team, later enthusiasm decreasing (lower income?), decreasing until one or two persons left and they keep the coin alive... just alive. Coin is trapped in 50-100 satoshi rage with some better times of 200-300 satoshis.
Concerning devs - it could be explained. They need get smth for they work, you can't work hard only on idea, also additional expenses - travel, premises, servers, etc. You must sell premined coins, when the coin price gets lower, you must sell more, price gets even lower, and so on. Until return is small and cover only necessary expenses.
To be honest - I have sold all my ETN long time ago. Ppl said that I am hater of ETN, laugh on me when I sold at 0.14$, laugh when I have sold at 0.11$, and last at 5USc... I am not against ETN, hope it recover fast, just share my opinion.
If the market will turn around ETN price will increase as well. And i believe that this will happen sooner or later. Given that, the better decision that someone should do is to HODL his coins (this is not limited to ETN only). The market is going to sustain this seige and eventually return to its normal standards.