Satoshi was a scientist, and that was a theory... scientists work on theories, that is, expectations of the future given certain data that you posses. It made sense for him that as adoption happened, price would go up. And it will, after this earthquake is done. Bill Gates is on the crypto game now, we'll see more and more adoption happening.
Or rather a hypothesis... Anyway the trading volume of Bitcoin remains extremely low compared to any fiat currency.