✔ 最佳答案
General speaking, people in this world tends to buy in something safe. US dollar suppose to be the most safe and stable currency in the world as it links with oil transactions. You see many big country has so many US dollars in hand like china, HK...etc
However, when rate drops, noone wanna buy in US dollar as the return lowers so the currency becomes weak and people holding us dollars afraid their lump sum falls. In the meantime , they have to shift their money from something they think safe to another also safe products. THAT"S GOLD.
so when US dollars drops Gold will rise.
hope can help u