If the NSA created Bitcoin, why did the CIA need Gavin to brief them on what it was?
So you would be able to ask that question.

CIA != NSA
Hypothesis: Bitcoin is the creation of NSA, but only a few people inside NSA would know about it. CIA would go by the official story that Bitcoin was created by the lonely programmer Satoshi. Even if they knew the truth they wanted to pretend as if they believed in the official Satoshi story.