I received this article in an email today and I thought it was interesting.
Virtual currency that's been surging in value, stored in internet-connected banks and virtual "hot wallets": What could go wrong?
The answer: About $175 million worth of stolen cryptocurrency and counting. And those are just the losses tied to three exchanges that have been hacked in the past year and quantified, at least in part, their losses (see Cybercriminals Go Cryptocurrency Crazy: 9 Factors).