I've met the VC (actually angel investor) in question. He's a really good and honest guy. He's not a shark.
This is due to two problems. First, the changeover to new management had not been completed yet, and when one of their systems was hacked it gave an opening to hack the trading site itself. This was a really serious failure, but also understandable since they hadn't finished auditing things to figure out how to secure them.
The second problem is that Bitoinica was hacked together quickly by a very talented individual without a lot of experience. He didn't cover his bases. The lack of backups is one of the major bases he didn't cover. He did at least take the precaution of making sure most of the bitcoins his trading platform was managing were in an offline wallet, which is why bitcoinica lost 80k USD work of bitcoins instead of some much larger amount.