How to make easy money?

Historically gold was by far the most widely recognized commodity out of which to make money: gold was compact, easy to work into more beautiful jewelry, had decorative and functional utility as a finely strung wire or thin foil leaf, and most importantly, could always be traded for other metals to make weapons with. A state could be described as a political enterprise with sufficient land, gold and reputation for protecting both, e.g. the Fort Knox gold repository long maintained by the United States, could reliably issue certificates to substitute for the gold and be trusted to actually have it. Between 1933 and 1970, one U.S. dollar was technically worth exactly 1/35 of a troy ounce (889 mg) of gold. However, actual trade in gold as a precious metal within the United States was banned - presumably to prevent anyone from actually going up to Fort Knox and asking for their gold. This was a fairly typical transition from commodity to representative to fiat money, with people trading in other goods being forced to trade in gold, then to receive paper money that purported to be as good as gold, and then ultimately see this currency "float" on commodity markets.