The argument has been made by quite a few people that satoshi's alleged stash is a cloud over the market since he could decide to start selling it at any unknown time.
Satoshi could also decide to reinvest his stash back into Bitcoin R&D, education, marketing, bootstrapping, etc.
Imagine the headlines if He started to pay people (in highly-collectible OG Bitcoins) to teach farmers/tutors/doctors/unbanked/emigrants how to use Bitcoin!