Based on the quality of the design/platform, I would surmise it wasn't written by a single person. Personally, I believe it was created as a way of maintaining quasi-liquidity during global financial turmoil. The ledger also allows trackbacks/history, so it would not surprise me if it was created by a nation state or states. The math and design are too elegant for a single person to have designed imho, but not out of the realm of possibilities.
The ledger is globally accessible, which would allow people with the means to track transactions during the fiat -> btc btc-> fiat transition. When I see thousands of ATM's in my country that have no cameras I will remove my suspicions.

Ufo
This is why I think btc was created by a group of people, and they used the name "satoshi" so that there was always a mystery man (who doesnt actually exist) at the center of btc. That way people spend their time looking for this "lone programmer", and the longer the group remains anonymous, the better their chances of staying anonymous are