During their time, the best form of money they had was gold. But now we have Bitcoin which is much better. Ludwig von Mises — argued against discretionary central banking and inflationary expansion; advocated sound money and free banking principles. Friedrich A. Hayek — criticized central planning of money; supported rules-based monetary systems and denationalization of money (competition among currencies). Murray Rothbard — advocated the gold standard, abolition of central banking, and a 100% gold-backed money supply. Carl Menger — foundational theorist for Austrian value/price theory; supported commodity money naturally arising from market processes. Eugen von Böhm-Bawerk — contributed to Austrian capital theory and supported monetary arrangements anchored in real commodities (e.g., gold).