Bitcoin is not so well-defined as a
currency in comparison to a dollar or yuan, and thus its uniqueness is much
less clear. The currency based on a
mysterious algorithm whose originator is
anonymous. No one really knows whether the algorithm can be trusted to generate Bitcoins as promised, or who would be accountable for errors or frauds; there is no definitive monetary
authority.

Were any problems to occur, a new
electronic currency, perhaps one
vouchsafed in a more transparent way,
might arise.