"I was almost giving up in life.

"It's the kind of conditions that we consider a bit of a perfect storm for gold," explains Louise Street, senior markets analyst at the World Gold Council, a trade association funded by the mining industry."It's the focus on potential inflationary pressures. Recessionary risks are rising, you've seen the IMF [International Monetary Fund] downgrading economic forecasts very recently…"

But what goes up can also come down. While gold has a reputation as a stable asset, it is not immune to price fluctuations. In fact, in the past, major surges in the price have been followed by significant falls.So what is the risk this could happen again, leaving many of today's eager investors nursing big losses?Helped by its relative rarity, gold has been seen as an intrinsic store of value for centuries. The global supply is limited. Only around 216,265 tonnes have ever been mined, according to the World Gold Council, (the total is currently increasing by about 3,500 tonnes per year). This means that it is widely perceived as a "safe haven" asset that will retain its value.

As an investment, however, it has both advantages and disadvantages.Unlike shares, it will never pay a dividend. Unlike bonds, it will not provide a steady, predictable income, and its industrial applications are relatively limited.

The draw, however, is that it is a physical product that exists outside of the banking system. It is also used as an insurance policy against inflation: while currencies tend to lose value over time, gold does not.

"Gold can't be printed by central banks, and it can't be conjured out of thin air," says Russ Mould, investment director at stockbroker AJ Bell. "In recent times, a big policy response from authorities when there's been a crisis has been: slash interest rates, boost money supply, quantitative easing, print money. Gold is seen as a haven from that, and therefore a store of value."The most shocking thing for Jonathan, who had endured six gruelling months living and working underground in an abandoned South African gold mine, was the abuse he witnessed being meted out to children.

Some are recruited for cheap labour, but others are brought in specifically for sex, campaigners say.Jonathan, now in his late 20s, had migrated to South Africa from a nearby country on the promise of making easy money working in one of its dozens of disused mines, closed by multinationals because they were no longer commercially viable.

We are protecting his full identity as he fears reprisals from the vicious criminal gangs that run the illegal mining industry for speaking to the media.Details of what the young people were going though emerged after the death of dozens of illegal miners near the town of Stilfontein late last year when the mine was blockaded by police.