The Globe and Mail reports in its Friday edition that bitcoin has similarities to currencies, as well as commodities such as gold, and since there is a limited number, it could be considered a scarce resource. A Bloomberg dispatch to The Globe says that what ultimately matters is how the U.S. Securities and Exchange Commission sees it. "Bitcoin is not a stock, it's not a bond, it's not a hard asset like precious metal, it's not a commodity future," said Ben Johnson, director of global ETF at Morningstar Inc. "It's a technology that's very much in its infancy, and it's not something that in my mind lends itself to being packaged as an ETF." The Winklevoss Bitcoin Trust is one of three such vehicles seeking regulatory approval. The SEC will decide by March 11 whether Tyler and Cameron Winklevoss's ETF proposal is approved. Bitcoin Investment Trust, which filed in January to list on the NYSE Arca, already trades over the counter. The other contender, SolidX, has a big differentiator: It promises to insure its bitcoins from loss. The Winklevoss's ETF, which first filed with the SEC in July of 2013, has amended its S-1 filing multiple times over the years to address regulators' concerns.