At what point are golden handcuffs simply not worth it?

I work at a company that was extremely generous to early employees when it came to equity packages. Without getting into whether or not I should value my equity given the economy, I was given a lot if our company continues its trajectory, the package will have significant impact with my family. As a result, I have had my role diminished, despite over performance against my KPIs and I am now in a position in which I'm being asked to take a ~15% pay cut to completely move out of my role & do something completely different. However, my golden handcuffs are strong because I truly feel like I lucked out with my early equity package & don't think I could find that elsewhere.