1. The document discusses the concept of salability - how easily an asset can be sold - across three dimensions: time, scales, and space. Gold has high salability across time but low salability across space due to high transportation costs.
2. Fiat currency has much higher salability across space than gold, since it can be transferred digitally at low cost. This allows for easier trade and banking activities across large distances.
3. However, high spatial salability of fiat also enables fractional reserve banking and bailouts of insolvent banks by central banks. This has led to a system dominated by banks and inflationary credit expansion over time.