I want to know which currency is the most expensive in the world.

This topic is quite interesting because it's not just large countries that have expensive currencies.
There are also currencies from oil-producing countries that are wealthy.

Let's look at the list of the most expensive currencies in the world for the year 2025.
First is the Kuwaiti Dinar, at 1 KWD = 3.26 USD.
Kuwait is rich from oil, producing about 3 million barrels per day, which makes its GDP per capita exceed $20,000 annually.
Therefore, the Kuwaiti Dinar becomes the most expensive currency in the world.

Second is the Bahraini Dinar, at 1 BHD = 2.65 USD.
Like Kuwait, Bahrain relies mainly on oil exports.
Its economy is stable, and inflation is low, making this currency highly stable.

Omani Rial (1 OMR = 2.60 USD) ranks third.
Oman produces about 1 million barrels of oil per day, with a 4.1% YoY economic growth, and has a current account surplus consistently.

As for countries not wealthy from oil, such as Jordan, the Jordanian Dinar (1 JOD = 1.41 USD) ranks fourth.
Although its economy is smaller than neighboring countries, it still holds foreign reserves of approximately $13.53T.

The British Pound (1 GBP = 1.33 USD) and the Gibraltar Pound (1 GIP = 1.33 USD) are also expensive currencies.
The Pound has a long history; the UK is the 6th largest economy in the world, and London is a major financial hub.

The Swiss Franc (1 CHF = 1.21 USD) is known as a Safe Haven currency because it must hold at least 40% gold reserves of its money supply.
Switzerland has been a neutral country since World War II.

The Cayman Islands dollar (1 KYD = 1.20 USD) and the Euro (1 EUR = 1.13 USD) are also considered expensive.
The Cayman Islands serve as an offshore financial center.
The Euro is used in 20 European Union countries.

The most expensive currencies in the world are not solely based on value.
The stability of the economy supporting the currency is even more important.
Some might think that an expensive currency is safer, but in reality, it mainly depends on the credibility of the government and the strength of the economy.
Most of the world's most expensive currencies come from countries with stable financial foundations, whether they are wealthy oil producers or major economic powers.