I actually think that he somehow saves important quotes somewhere. I don't think he just remembers everything and then every time he has to quote, he has to search for the thread and then for the exact post to quote it.

Let's hope he comes here again and clears up the doubt.

Regarding what the OP says, not much more to add to Satoshi's quote, simply that it is a mathematical question of supply and demand. Today we still have large price swings but at a constant demand, if the supply is smaller the price is higher, there's no secret.