The Pirate Revolution
Gold is the coin of the realm, much like Silver, but a much higher value to each coin in Gold than SIlver. Most men do business in Gold when something is of high value or fame. Also when a large set of cargo is to be sold, if only for the salvation of space.
However, gold is more than a coin, those of true decedance surround themselves with items of gold, decorations of all kinds that shine and shimmer.
Though one must be careful, being known to carry a hold full of gold is as obvious a mark to any that would want to take it as inviting them on board.