I know this is an old topic, but recently with btc hitting 50k this whole topic is mainstream - and this post was #1 in google.

To answer the points raised. The motive is simple - to dump the SN coins once the market reaches 100k or 250k per btc. The reason for that could be profit or could be to damage economies by eliminating billions/trillions in wealth.

It is clear from the SN posts and emails that several people are involved. The writing style varies, spelling between US and UK English (cheque and check are both used), and the focal points vary. Also there was a message about freedom and that was the first one I saw which had a typo from SN (a centrally controlled networks) on 2008-11-06 20.15.40. Typos usually reflect emotional responses.

Another pointer is the sheer magnitude of the idea, implies an organization.

An individual would have sold the assets long ago.