that's one of my concerns with a hard wallet. it depends on potentially fallible hardware & unbuggy software. I appreciate the dangers of having it on an exchange or even just a software wallet. I'm more concerned with failure of one of these components than worrying about an exchange going south. right now it's is one of my least of the worries with a personal hack being the least.
but, I guess they're all possible, so do what you will.
