Hello! New to this forum but here's my thoughts.
If i was Satoshi i would do exactly the same thing, sit on the coins.
With current course it's worth 600-700,000,000$. That is shit load of money, but it will be much more in the future.
I think creating bitcoin is only the first step. Satoshi is a believer in bitcoin(ideology), and he probably sees the price hitting anything between 10,000-50,000$ in future. Now we're talking about real POWER. You can bring down goverments(or help them), raise armies, help scientific developement or do pretty much anything you want.
I'd like to think that the money will be used to make the world better place.