Sandra Sullivan said:That whole volume trick isn't foolproof either, because on average, you can still fudge those numbers.
For example, if you have 1 kg of gold with a density of 100, you could mix half a kg of one metal with a density of 90 and half a kg of another with a density of 110, and on average, you’d end up with the exact same volume.
At the end of the day, digital gold is the safest bet since it's always 100% pure. 🙂
It is extremely difficult to create an alloy with a density precisely matching gold. A group of relatively rare or radioactive metals—like osmium, iridium, platinum, or lanthanides—has a slightly higher density than gold, while tungsten has almost the exact same density:
http://www.lenntech.com/periodic-cha...ts/density.htm
Based on this list, you would have to mix osmium or iridium with tantalum just to achieve the correct density. Considering an ounce of osmium runs $960 and iridium is $1,460, the tungsten option is significantly cheaper.
However, there is one critical difference between gold and all these potential "substitutes"—gold is the most ductile of all metals. From a single gram of gold, you can draw a wire three kilometers long. This is vital because you simply cannot replicate something like this through forging with tungsten:
http://www.taxfreegold.co.uk/1915austrian4ducats.phpIn any case, I prefer coins over bullion for that very reason. It is easy to manufacture a fake bar out of tungsten, but a coin is much, much harder to fake...
As for digital gold or oil, it should be obvious that we are talking about futures contracts. They are essentially a type of bond where someone claims something will be paid at a certain price later, even though the actual physical product might not even exist. People buy gold specifically because there are no obligations involved; you own a set amount of gold, and that is that. Furthermore, your Forex account can go under right along with the brokerage firm. Haven't you heard of MF Global?