I beg to differ.
You see, unlike you, I know there are huge stashes of gold in the Bank of England vaults and in Fort Knox.
It may only be worth a small fraction of the entire currency, but it's still the case that both the British pound and the American dollar are backed up by gold.
The British pound would have been even further backed up by gold had a certain socialist, economic illiterate, Scottish Chancellor not sold off 400 tons of Britain's gold reserves between 1999 and 2002 when the price of gold was at its cheapest for decades (the prices then were between $256 and $296 an ounce; and now are worth $1,615 per ounce today).
I think you are a little out of date there, bloke!
http://goldprice.org/