I refer the honourable commenter to Jumpcrisscross' comment here: http://news.ycombinator.com/item?id=3787375 http://news.ycombinator.com/item?id=3787375, where

I refer the honourable commenter to Jumpcrisscross' comment here: http://news.ycombinator.com/item?id=3787375 http://news.ycombinator.com/item?id=3787375, wherein they point out that to currency traders, Bitcoin's vulnerabilities have been known for a hundred years.