The regression theorem explains that media of exchange must have a price (which Mises calls “objective exchange-value”), and in order for this price to emerge, it needs to be backtracked to barter. It is an odd way of phrasing the phenomenon of the network effect. Mises explains this in ToMC when he says that people want money not only because they use it directly, but because they other people demand it. He explains this results in a change of ordinal ranking caused by the preferences of other people. This explanation is identical to that of externality: utlity a person derives from a good is influenced by the utility others derive from it.
Some people interpret this as that the “backtracking” requires a legal or a coercive (which explains fiat money) foundation. Mises however elsewhere argues that, for example, money substitutes do not require a legal link for redemption, a customary redemption is sufficient. Then there is no reason why this restriction should apply to the link in the evolution of money in the narrower sense either. In other words, if a medium of exchange trades against other media of exchange, it does not matter why as long as it works.
Since Bitcoin has a price, and has a historical link to preexisting money (see http://www.bitcoincharts.com, for example), either it fulfills the regression theorem, or the regression theorem is wrong. Take your pick. How exactly the price emerged might be of interest to economic historians, for the purpose of the regresison theorem, however, is irrelevant.
The reason why some people claim that Mises’ Regression Theorem disproves Bitcoin (rather than the other way around) is that they are making implicit assumptions which I already explained, for example:
- there are only production goods, consumption goods and media of exchange
- the number of users takes absolute precedence in the outcome of the network effect
- a medium of exchange requires some arbitrary starting price, which is above that of Bitcoin
These are just what I said, implicit assumptions. Mises only made the first one, he didn’t make the others. Those were made up by his faux-followers.
Even before Bitcoin, economists have already predicted the emergence of completely virtual currencies on a free market. Selected references:
- Tatsuo Tanaka (1996): Possible Economic Consequences of Digital Cash
- Michael Woodford (2000): Monetary Policy in a World Without Money
- Malte Krüger und Hugo Godschalk (1998): Herausforderung des bestehenden Geldsystems im Zuge seiner Digitalisierung - Chancen für Innovation?
The last one is, in my opinion, the most accurate prediction, because it foresees the issues with integration with existing monies, and also that the advantages of this new money can, under certain circumstances, overcome the network effect of fiat money. Here’s a quote:
or in English:
There is no way of telling what the future of Bitcoin will look like. However, it it fails, it won’t be due to the regression theorem, rather because it stops having the advantages it has, or at least they won’t be sufficient to compete either with other currencies or other payment systems.