My loses are heavily over 99%. I am sure that I will never be able to recover my funds.
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From my point of view, the project is at a dead end.
I think you should not confuse the token price with the status of the project. Token price is down. Same goes for almost 99.99% of all other projects including Bitcoin. So that's not a particular feature for this project. It also isn't a measure of success. If that would be the case, Bitcoin and Ethereum would be dead now as well. What we see - to the contrary - is that Bitcoin and Ethereum are more alive than ever; solely a price decline is hardly the signal for a dead crypto project, especially in a bear market.
If you think Nimiq missed the bus of the big Crypto Hype of 2017, I can imagine so. The mainnet release was after the blow off top and little was done to market the project which (from my point of view) deserves a top 100 CMC spot. But did you sell your NET in December 2017? Was it above your entry price then?
Questions about the project's direction are good. They fuel reflection and proper thought processes. But if your sorrows are about not selling at the top, you only have yourselves to question.