This isn't how much gold there is but it's how much gold was traded AFTER free trade was re-introduced, just to give you a general idea you can use this
"
Tuesday 1st February 2011 is already being hailed as an historic day in RuneScape. The return of free trade and the Wilderness has had a massively positive effect on the game and shown just how much you are enjoy having these features back in RuneScape.
In the three days since the update, more than 17.5 trillion GP has been traded in player-to-player trades, nearly 10 trillion GP has been staked in duels and dropped in Wilderness kills, and a massive 19.5 trillion GP has been traded on the Grand Exchange, not to mention the huge number of generous gifts between players! That's a
total of around 47 trillion GP! Just to give you some context, 1 trillion GP would currently get you
1,222 blue party hats, so there has certainly been a lot of trading.
That 17.5 trillion in player-to-player trades is greater than the total value of stocks traded on the New York Stock Exchange during the same period. You could buy all the gold bullion in Fort Knox nearly three times over, and the Crown Jewels of the United Kingdom are worth a mere 20 million. In fact, 17.5 trillion is more than the entire GDP of the European Union!"
Information taken from:
http://services.runescape.com/m=news/free-trade-competition
Location: Home >
News List > Free Trade Competition