Compared to going to prison for the rest of your life? Most of what Hillary might reveal is already known at least in part. Even you made a list. It's not enough. Obama would promise a Presidential Pardon. He might even give her one. Maybe.
Not to mention shenanigans back in Chicago (Tony Rezko was one known example, I'm certain there are others and the Clintons must know of them). Neither one of them will ever see the inside of a prison, you can be sure of that. Politicians take care of their own, even when they hate each other. But they can destroy each other, I'd bet.