Bitcoin could very well be the investing story of 2017, with its meteoric rise in price (up more than 1,100 percent year-over-year, according to Coinbase). Comments from billionaires and business barons who have called it a bubble — including Jamie Dimon, Jack Bogle, Warren Buffett and Mark Cuban — haven't deterred believers. And you can add to the doubters' list another group of big-name market skeptics.
More than one quarter of respondents (27 percent) taking the recent CNBC Global CFO Council survey see bitcoin as a fraud, while another 27 percent said it is a "real" asset, but in a bubble. Only 14 percent say it is "real and still going higher" in value.