Also the more philosophical argument: At the moment there is a large controversy in the bitcoin community about whether the blocksize should be increased or not. If we found out who Satoshi is and can provide evidence what blocksize is nearer to Satoshi's "original vision" this could change the balance of power in the Bitcoin community.
TLDR: It is about money and power.
So, why would discovering the real-life identity impact the exchange rate? What exactly would be different if Satoshi stepped out on an aircraft carrier with a big "Mission Accomplished" banner today?
I find the philosophical argument fascinating. It's like a bunch of Antonin Scalias arguing about the need for a strict constructionist view of the Founder's vision, to then find a foothold for draping it around their own subjective views for legitimacy? I had no idea shit got this real in the Bitcoin world.
If we came to conclusion that Satoshi was a "I mined lots of early blocks who gave a really high block reward. And you all were all parts of this 'Ponzi scheme' which made me rich" kind of person - I can image quite well the consequences for the BTC exchange rate.
If we found out that Bitcoin was an experiment by some CS genius that got a little bit out of control in scope, the trust many have in the Bitcoin protocol (reflected by the exchange rate) would probably decrease, since people could conclude that Bitcoin wasn't as thought-through as many Bitcoin advocates want the world to believe.
On the other hand, if we concluded that Satoshi was some computer scientist whose expertise simply rather lies in cryptography and who secluded himself from Bitcoin simply for the reason that he knows that the next steps will need an expert for scaling of systems for which he will be no help, but he is sure the further development of Bitcoin is in good hand, this would probably increase the trust people have in Bitcoin and thus increase the exchange rate.
I could write down lots of other fictional examples, but I think the idea is clear.
Then depending on the legal jurisdiction of that person...
* The employer have a claim on the IP and the initial licence was incorrect
* The employer have a claim on the bitcoins
* The employer could have a claim on any core patent that arises
This is just from a UK patent law based view where it is repeatedly made clear to employees not to work on side projects or other things on work equipment and time.
So there is a potential legal risk, if it's determined that Satoshi was working on this using his employers resources.
The moral is quite clear, though: don't ever, ever use someone else's equipment and time to build your own thing.
Who has 6% of the total gold?
Who has 6% of the total rice?
Who has 6% of the total 56K modems?
Maybe this is Bitcoin's version of identifying the 0.01%.
It's somewhat ironic, because I hear and read all this fluff about the anonymity of Bitcoin and how attractive that is, but everyone's just dying to out Satoshi.
Why does anyone care about who Satoshi is IRL? Is it the mystery? The hunt? Is there a Bitcoin prize to be had?