Ultimately, the currency system of central and fractional reserve commercial banking isn’t actually a money system. It is a communication system and network of ledgers based on deals and politics, held together by that ugly part of human psychology that goes the way of our fallen nature. Its “mathematical” basis—Cartesian math on a Cartesian plane because human beings are largely creatures of obedience and mimicry, largely fueled by insecurity and fear.
Indeed, it has been virtual for far longer than all those disciples of “new money” and new technology proclaim.