The most valuable piece of paper in the world is a ballot, not paper money.
Paper money can be inflated, deflated, or can become worthless. Paper money can buy power and influence for the individual possessing it.
But a ballot is a piece of paper which has the potential of exerting the power of the people over those who would become our masters. About 350,000 paper ballots, reflecting the political intent of a Congressional constituency, can put a diligent and honest public servant in office, but 350,000 dollar bills cannot put a power mad psychopath in Congress.