Money dreams sit in the same broad "good news" family as pig dreams, but with more moving parts worth knowing about, because not every version of a money dream is read the same way — and one of the readings genuinely surprises most people the first time they hear it.
Finding money you didn't expect, or being given money directly by someone in the dream, is read the way you'd guess: as fortune on its way, close cousin to the pig dream in both meaning and in the lottery-ticket-buying behavior it tends to produce. Gold specifically carries extra cultural weight in Korea beyond its raw value — gold rings and jewelry have long functioned as a practical store of wealth and a traditional gift, most visibly in 돌반지, the gold ring customarily given to a baby at their first birthday celebration (돌잔치). A gold dream taps directly into that layer of meaning, not just "money" in the abstract.
The genuinely counterintuitive part is losing money in a dream. In a lot of folk dream traditions worldwide, including this one, losing or spending money in a dream is sometimes read as flipping to mean the opposite in waking life — a paradoxical "loss predicts gain" reading that shows up in several other dream categories too, not just this one. It's not a universal rule that every interpreter applies the same way, but it's common enough to be worth knowing, since it runs directly against what most people would assume on instinct.
As always, the honest caveat applies here just as much as it does to the pig dream: nobody is keeping score of the money dreams that led to nothing, which is most of them. What the tradition is actually good for is the same modest thing it's good for everywhere else on this site — giving a specific, shared shape to an otherwise vague good feeling, not literally forecasting your bank balance.