What currency will replace US$ as world reserve or trading currency?

[explorer]

gbp? - likely not, their economy is not that great anymore

British economy has been doing good...but i don't think GBP will have any chance to replace USD as trading currency

from: Can UK economy stay top of the league?

Can UK economy stay top of the league?

If the latest Markit survey of business activity and orders is accurate, the British economy is growing at a remarkably rapid 1.3% in the last three months of the year - which would be faster than any other rich developed economy.

The UK is growing significantly faster than Germany and the US, for example - and probably faster than Japan, which in my strained analogy is Liverpool FC, whose under-performance has endured even longer than Arsenal's.

If that estimated British growth rate is accurate and sustained, UK GDP in 2013 will rise over 3% - which is significantly faster than any mainstream economist is currently predicting and would be a return to growth rates we haven't enjoyed since the financial and economic crash of 2007-8.