The Dragon Arrows
The world economies function on the copper standard, not gold. Most transactions occur using CP, with more valuable coins being increasingly rare. An average unskilled laborer earns 2 SP a day, while skilled workers usually fetch 1 GP. Most of the peasant farmers in the world probably scrape by with a few coppers and may go their entire lives only seeing a handful of actual gold coins in person.
To relate it to modern economies, a CP (copper piece) can be thought of like $1, a SP (silver piece) like $10, and a GP (gold piece) like $100. It’s not a direct conversion, but these are roughly the tiers of spending power you’re getting. Now you know how generous you’re being if you toss a SP into a beggar’s cup, or if the someone is trying to rip you off charging a GP for a basic service.
EP (electrum piece, worth .5 GP) and PP (platinum piece, worth 10 GP) are rare in the human lands, and most surviving coins come from elven or dwarven kingdoms. While they are recognized as having value, many human establishments may not accept them.