Me too mined POS and I had a few masternodes and that is why I start to think about this now when they all are very overpriced.
I don't think you can lose more value per coin because is near 0 so there is not much risk that they will go down further and if even then not much. The most important thing would be to find these projects which are worth something and POS mined with masternodes. Needs a lot of time to make all this work because there are hundreds of them literally.
The best infos are always from insiders, people who are already from some time involved but not brainwashed of course
. This is why I am counting for.
Additionally, discussion about this kind of coins and if they have any chance to stay as a long time projects or that was only the HYPE and they are flawed as you have described above and until today everybody knows about it already and this is really the end for this kind of projects?