Bitcoin first appeared in 2009, and it's already challenging everything we've come to accept about money, financial institutions, and even government. The digital currency can be nearly anonymous. And it can be traded internationally-without the fees, government regulation, and bank oversight of paper money. But Bitcoin is still risky. Its value fluctuates wildly. More than $400 million of it disappeared overnight with the fall of a single trading exchange. How is that possible? And why is it so popular? CNNMoney reporter Jose Pagliery explains it all. He details the digital currency's mysteri... View More...
