Holy shit--I get that this thread got necrobumped for whatever reason, but it's like a blast from the past.  I clearly recall BipolarBob doing exactly what you just described, i.e., swooping in and paying off people's loans.  Apparently out of the goodness of his heart, because I never saw him ask for anything in return.  I'd always assumed he was an old-school bitcoin whale with a lot of it to go around. 

I wonder what happened to him.  He's one of the many members who just kind of disappeared over the years I've been here, and I hadn't thought of his name in a long time.  Even if his account did get hacked, that wouldn't preclude him from creating a new one.