"I love gold," said the 48-year-old flamenco guitarist outside a cafe near his West Hampstead home, recalling a series of decisions that led him to invest thousands buying gold through an online platform. "It's beautiful, isn't it?"
A former antiques dealer, Berger was at the fore of what has emerged as a sizeable herd of private investors worldwide buying gold in various forms. In eight months he estimates his original 39,400 pound ($60,300) investment has risen to more than 52,500 pounds -- a return of nearly 35 percent.
"If I'd put it in the stock market, I could have lost the lot. If I'd put it in a bank, it could have gone bankrupt. If I'd stuck it under my mattress, I could have been robbed and had nothing left," he said.
Spot gold <XAU=> prices jumped 14 percent in the week after Lehman Brothers filed for bankruptcy protection last September, and tumbling stocks and fears over the stability of the financial sector fuelled a sharp run to an 11-month peak above $1,000 an ounce in February.
Gold is currently trading just above $900 an ounce -- well below its recent highs, but still historically strong.
Worries about bank stability and volatility in other assets have driven more small investors into gold but its popularity is also due to the simplicity with which bullion can now be bought and sold, he said.
People can buy coins and bars in person, over the phone, online through sites such as BullionVault.com which Berger used, or through the post from companies like ATS Bullion, Baird & Co and Gold & Silver Investments.
Walker says that while clients' interest in gold jumped as the financial downturn bit, headlines suggesting the downturn may be slowing make heavy investment in bullion at this stage more risky, especially as other assets, from equities to property, are relatively cheap.
Analysts say fears are now rising that the quantitative easing measures put in place by authorities around the world, as well as record-low interest rates in countries including the United States, could cause a spike in inflation if a recovery gets underway.
"If expectations that the economy is beginning to recover take root, we may see a shift in the forces driving gold trading away from safe-haven buying and towards inflationary expectations," said James Steel, a precious metals analyst at HSBC, in a note to clients.
Only when central banks turn hawkish would the bears win the ground on gold, in his view: "Gold prices are unlikely to substantially retreat until investors are assured that the Federal Reserve and other central banks will be able and willing to combat inflation, should it increase, once a recovery takes hold."
"We have certainly seen an enormous rise in private individuals purchasing over the last couple of years, most of them looking for some kind of safeguard for their money," said Sandra Conway, chief executive of ATS Bullion, one of Britain's largest sellers of gold coins and bars.
Client demands range upwards from those seeking half a sovereign as a gift: gold bars range in size from 10 grams to one kilogram. Investment gold is also exempt from value-added tax in Britain, Conway said.
These products do cost more than the value of the gold itself. The smaller or scarcer the item the fatter the premium to spot gold: for ATS' one-ounce Krugerrand coins the premium is currently around 12 percent, up from about 5 percent a year ago. Investors also have to pay insurance and storage costs.
Besides physical gold, products such as exchange traded funds (ETFs) offer exposure to the gold price without having to store the stuff. The Web site Berger used stores his gold and allows him to trade it online.
Gold ETFs issue securities which are traded on a stock exchange, backed by physical bullion that is held by an independent custodian. In theory, if the ETF issuer were to fail, the buyer can still redeem the gold from the custodian.
A small but significant proportion of its investors are from the retail side. "A much wider range of investors are getting involved with gold now than ever before," said the company's head of research Nicholas Brooks.
Trading gold can be risky: Berger says a few bad decisions over the months have cost him around 10,000 pounds. But he is not so enamoured of the metal he couldn't see himself selling. He plans to stay in the market until the end of the year, expecting another run higher over the summer before bullion weakens ahead of 2010.