Brilliant! Get that published in a letter to a newspaper which has reported this. It's a good way to point out the state of the Emperor's New Clothes.I just measured a fiver, 124 x 64mm, or 7936 mm squared. 7936 x 126 = 999936, which is near enough one square metre. So covering your walls with fivers would "only" cost about 126 x 5 = £630 per square metre. It would also show visitors your true apprecation of what to do with your wealth.