Bitcoin's most distinctive feature is its capped supply of 21 million coins—a hard limit written into its code from day one. This finite nature fundamentally differs from traditional currencies that central banks can print at will. It's precisely this scarcity principle that some regulators and policymakers view with skepticism. Governments worldwide have labeled Bitcoin's fixed monetary supply as problematic, citing concerns about deflation, market volatility, and the challenge it poses to conventional monetary policy tools. Yet this immutability remains one of Bitcoin's core value propositions for advocates who see it as digital sound money.