hal finney, in a january 2009 bitcoin forum post, speculated that if bitcoin became the world's dominant currency, its 20 million coins could capture global wealth of $100-300 trillion, valuing each at about $10 million.
neither satoshi nor the whitepaper mentioned fiat prices.
bitcointalk
https://bitcointalk.org/index.php?topic=34.0
decrypt
https://decrypt.co/16494/hal-finneys-idea-now-sees-18-million-bitcoin-price-prediction
