In fact, bitcoin has the same functions as gold, so it is also a viable alternative to currency. But with another bitcoin is not a full-fledged money because it is not considered a generally accepted form of calculation, like gold. But bitcoin still has all the same properties as gold, so in the future it can become one of the best means of preserving value, since the total number of bitcoins will be limited (this may indicate that its value will only grow); the gradual increase in the number of bitcoins in circulation did not provoke critical changes in the total bitcoins volume and, finally, the bitcoin of the transaction can not be faked. While history knows cases of falsification with gold.