Undeclared fractional reserve would definitely fall under the crook category- I’m certain that will happen somewhere in this market of “banks”- but at what scale? Am I naive in thinking there’s some kind of social layer within this community that would enforce transparency to allow a mint to even get large/popular enough to be systemic? Over-engineering “perfect” solutions and leaving nothing to the social layer comes with its own complexities, unforeseen consequences and never mind UX/scaling issues…