Sorry not my project but it seems how it works is that when there an ATH, the price floor is set 80% of the ATH. People can still sell, and it protects investors money, for those that are in for the long term.
From https://news.ycombinator.com/showhn.html
> Show HN
> Show HN is for something you've made that other people can play with. HN users can try it out, give you feedback, and ask questions in the thread.
> The project must be something you've worked on personally and which you're around to discuss.