"Then one will replace gold with another form of money. It would be pointless to speculate today on the solution that could be found to this problem. All the conditions under which this decision will have to be made are unknown to us today."
Ludwig von Mises - Human Action (1949)
Mises repeatedly states that gold is likely not going to be the best form of money forever. He anticipates the money of the future and indirectly describes #bitcoin.
