I just found out that the most expensive money in the world isn’t the British pound or the euro like I thought—it’s the Kuwaiti dinar! One unit can be exchanged for $3.26. In addition, the Bahraini dinar and Omani rial are also among the most expensive in the world.

What’s interesting is that most of these most expensive currencies come from oil-exporting countries. Kuwait produces 3 million barrels of oil per day, which makes its economy strong. Meanwhile, the British pound and the Swiss franc remain strong because of the countries’ credibility.

Compared with the euro (1 to 1.13 dollars), it’s still more expensive than many currencies. But the most expensive currency doesn’t necessarily mean the strongest economy—you also need to look at the government’s credibility.