Seeing as how Enpass does such a great job of providing cross-browser, cross-platform, fully integrated password management, I think it is a perfect candidate for bookmark management.
I'm not really pleased with the current options in this regard, and having them encrypted might be useful to some. If this was available in Enpass, and it was powerful enough to organize bookmarks under a tree and search them, and replaced the bookmark button in the browser (easy as hitting the * button), I think I would finally be satisified with my browser experience.