Very good.
I liked his answer to the "regression theorem":
Menger and Mises would love Bitcoin
Many ‘Austrians’ get thrown off by Menger’s theory of the origin of money and Mises’ so-called ‘regression theorem’, and somewhat rashly conclude that Bitcoin can never achieve money-status because it did not originate from a non-money commodity. Mises was correct when he stated that something could only become money if it had previously, that is, before it was used by somebody as a medium of exchange in its own right for the first time, established some value in trade. For if that had not been the case, how could the first person to employ the commodity as money have any point of reference by which to assess its value and determined its exchange value for the first monetary transaction? However, this theorem, which remains unrefuted in my view, does not apply to Bitcoin. Bitcoin can simply piggyback on established forms of money that already have exchange-value and derive its original value from them before it does, over time, establish its own value.
