conspiracy theory-
the nsa created/coordinates encyrption, including sha-256, the encryption that bitcoin is based on.
http://en.wikipedia.org/wiki/SHA-2
that's far from meaning they can hack the encryption, over time though, encryptions have proven hackable so it is a matter of time IMO that sha-256 is hacked.
however, sha-3 is on the horizon, pending authorization from nist.
http://en.wikipedia.org/wiki/SHA-3