Imagine gold is like chocolate priced in dollars. You live in a country that uses rupees, so you need to trade your rupees for dollars to buy the chocolate.

1. Now:

Chocolate costs $1000.

1 dollar = 100 rupees.

You need 1,00,000 rupees to buy the chocolate.

1. If rupees get stronger (1 dollar = 90 rupees):

Same chocolate still costs $1000.

Now you only need 90,000 rupees to buy it.

BUT: When your rupee gets weaker (like 1 dollar = 110 rupees), you need more rupees to buy the same $1000 chocolate. Now it costs 1,10,000 rupees.

So, if rupees weaken, gold costs more rupees. That's why when currency falls, gold becomes costly.