LONDON — A currency surging in value at a breathtaking rate this week belongs to no nation and is issued by no central bank. It can be used to buy gold in California, a hamburger in Berlin or a house in Alberta. When desired, it can offer largely untraceable transactions.
The coin in question now has a global circulation worth more than $1.4 billion on paper. Yet almost no one, it seems, knows the true identity of its creator. In the United States, this mysterious money has become the darling of antigovernment libertarians and computer wizards prospecting in the virtual mines of cyberspace. In Europe, meanwhile, it has found its niche as the coinage of anarchic youth.
The currency is bitcoin, a kind of cyber-money initially traded among hackers and cryptologists, and increasingly traded on Web sites and exchanged for goods and services. Two years ago, one bitcoin was worth less than $1. Two months ago, the price for one unit surged above $20 on a proliferation of cyber-exchanges from Tokyo to Moscow. A sudden burst of new interest sent its value soaring to a record $147 on Wednesday. It has since fallen back after a series of hacker attacks. Yet, as of Thursday, bitcoin was still trading above $130.
Will all that crash and burn in a cyber-version of a financial bubble? Critics say it quite possibly will. Will authorities — already concerned about the use of bitcoins to buy drugs and launder money online — step in to regulate it? There are signs that may already be happening. But for now, its diverse group of users ranging from the Free State Project and WikiLeaks to environmentalists and professional gamblers, call its surge a revolution in “financial free speech.”