Jumping onto a cloud of faith.

Food for thought.
Which is the biggest currency in the world?
I reckoned it was the British pound, but now i believe it's the kuwaiti dinar.
1 USD = 0.27448 Kuwaiti Dinar
1 USD = 0.50450 British Pound

I can't really find the answer to my question online, though i acknowledge that the pound is widely-known for being the greatest currency. But statistically, the Kuwaiti Dinar may be biggest as it is buoyed by its oil producing industry and related development.