Bitcoins becoming hot currency

Mike Caldwell, a 35-year-old software engineer, holds a 25 Bitcoin token at his shop in Sandy, Utah. Caldwell mints physical versions of bitcoins, cranking out homemade tokens with codes protected by tamper-proof holographic seals, a retro-futuristic kind of prepaid cash.

LONDON (AP) — With $600 stuffed in one pocket and a smartphone tucked in the other, Patricio Fink recently struck the kind of deal that’s feeding the rise of a new kind of money — a virtual currency whose oscillations have pulled geeks and speculators alike through stomach-churning highs and lows.

The Argentine software developer was dealing in bitcoins — getting an injection of the cybercurrency in exchange for a wad of real greenbacks he handed to a pair of Australian tourists in a Buenos Aires Starbucks. The visitors wanted spending money at black market rates without the risk of getting roughed up in one of the Argentine capital’s black market exchanges. Fink wanted to pad his electronic wallet.