It’s not hard to imagine that there’s a Russian hacking team looking at how to crack/exploit Bitcoin as we ’speak’...I’ll happily bow to your technical understanding of this subject.
Whilst it will be as secure as they can make it, a teenage hacker managed to penetrate US defence systems from his bedroom, who’s to say the more advanced technos can’t do something to mess things up?
I’m just thinking that whenever there’s a lot of money involved, there’s always someone, somewhere looking for a way to get their hands on it or simply to create problems to satisfy their own egos.