An Austrian medium of exchange presumes the medium has value.

When they say medium, they mean something that has good qualities of money such as fungiblity, durability, divisibility, etc. They acknowledge the medium will tend to increase in value when its accepted as a medium of exchange because of its additional use as a medium of exchange.

Whether a medium of exchange is a store of value is or not is implied by its property of being a medium that is valued and non-triviality to acquire. Most Austrians of the past assume that a medium has its value based on uses other than its usefulness as money. This is only because nothing like bitcoin has existed before.

Bitcoin is intrinsically a medium, this is self evident. Whether it's a medium of exchange is also unquestionable since it has all the necessary properties of a good money, and that its presently used as a medium of exchange. Its ability to serve as a store of value derives from its limited quantity and divisibility and wide acceptance of its value.

Whomever wrote this article (Hansen) is still in the blocksize/shitcoin honeypot and not aware of how lightning changes this paradigm. Bitcoin is for HODLing AND using as a medium of exchange; they go hand in hand.