So how do you think the strength of a country's currency help to boost economy of that country?
Let me give you a simple financial education.
Please first learn the difference between Expensive and Valuable!
The list you have provided, shows the top 10 most expensive currency. It has no relation with the most valuable currency.
If I create a currency today based on the value of diamond, it will become the world's most expensive currency. But if I am able to build a currency which is used by majority of the nations, that's the valuable currency.
I hope it will makes sense once you learn the difference.