How much money is there?

[Desmond Hawkins]

World's GDP doesn't say anything about how much money is floating around. I assume you mean the stock of capital built up over time, and GDP only gives the amound produced in a single year, not the amount that has accumulated. I think a recent estimate puts the valuation of Britain at 60 trillion dollars, in terms of capital/infrastructure and all that jazz.

 

[Aphex_Twin]

Um ... yes it is. When you ask 'how much is that worth?', the answer will be in currency.

If the world's quantity of money would double, would we be any richer?

 

[El_Machinae]

Of course not, everything would double in price.

I think we're not talking about the same thing. Something's value is measured in money - it always can be. If a currency has less value, then price in that currency will be inversely proportional to its value.