Re: Satoshi ..Private key lost?

- He is afraid of beeing found when he spends one satoshi
- He forgot his wallet passwords
- The harddisk with the wallets crashed
- He is dead

(Most likely in that order)

Collectively "Satoshi Nakamoto" is waiting for mass acceptance before revealing himself and starts dumping coin in market.

He might never know when that stage is achieved. It might already have or might happen soon. Even if it is mass accepted, the price won't necessarily sky rocket.

Occam's razor (or Ockham's razor) is a principle from philosophy. Suppose there exist two (or more)explanations for an occurrence. In this case the simpler one is usually better. Another way of saying it is that the more assumptions you have to make, the more unlikely an explanation is. Occam's razor applies especially in the philosophy of science, but also more generally.

Which is the simplest explanation with the least amount of assumptions?

The simplest explanation is that he is dead, killed by a jealous government when Bitcoin was just starting because it was suddenly new and associated with Wikileaks.