A great distinction of kind exists between condemning a practice versus endorsing a technology. It is principled to condemn the improper use of gold but not so much endorse its general use as a money. This is because an improper use can be contrary to the faith while the regular use may be neutral to the faith. This is equally true of other forms of money and currency like fiat and Bitcoin.

This is quite unlike something directly relating to the faith such as the one person in two natures of Christ, or the three persons in one being of the Godhead, or another matter of faith.

That being said, a tacit endorsement such as the acquisition and use of Bitcoin could well be merited.