It seems like every day brings new questions about the digital currency called bitcoin, which first appeared in 2009. Who is the shadowy "Satoshi Nakamoto" who created the currency's protocol and software? Who stole $450 million worth of bitcoin from the Tokyo-based Mt. Gox exchange? Who was the mystery buyer who used bitcoin to snag a $500,000 house on the Indonesian island of Bali?
Last week, the IRS solved a mystery by ruling on how bitcoin would be taxed, at least here in the United States. And their answer to that question may shoot a hole in bitcoin's hope to become more widely accepted.