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What is Money? ?? Fiat Currency USD: System of Control ?? (How Bitcoin \u0026 Crypto Can Protect Us! ?)The U.S.' dollars (USD) reserve currency status seems as safe today as it's ever been over the past decade or so � inflation is down, the U.S. A reserve currency is simply any currency held in large quantities and maintained by central banks and other major financial institutions. These. It is often considered a hard currency or safe-haven currency. The United Kingdom's pound sterling was the primary reserve currency of much of the world in the.