A Central Bank Digital Currency (CBDC) is a digital form of a country’s sovereign currency issued and controlled directly by its central bank — the digital equivalent of paper money, but programmable and existing on a government-controlled ledger. Unlike decentralised cryptocurrencies such as Bitcoin or Ethereum, CBDCs are fully centralised, subject to government oversight, and not censorship-resistant. Over 130 countries — representing 98% of global GDP — are actively researching or developing CBDCs, making them one of the most significant developments at the intersection of government finance and blockchain technology.
CBDC use cases and concerns: Financial inclusion — providing banking services to the unbanked via smartphone wallets; Payment efficiency — faster, cheaper domestic and cross-border settlements; Monetary policy tools — programmable money could allow negative interest rates, expiry dates on stimulus payments, or spending restrictions. The last point is also CBDCs’ most controversial aspect: programmability enables surveillance and control in ways cash never allowed — governments could theoretically restrict what you spend your money on, freeze wallets, or track every transaction. This is precisely why many in the crypto community see CBDCs as the antithesis of Bitcoin’s cypherpunk values. Launched CBDCs include China’s digital yuan (e-CNY), the Bahamas’ Sand Dollar, and Nigeria’s eNaira. The EU is developing a digital euro; the US Federal Reserve has studied a digital dollar.
Example: China distributes digital yuan via a lottery to citizens in pilot cities. Recipients can spend the e-CNY at participating merchants using a smartphone app, but the funds expire if not spent within 30 days — a programmability feature impossible with physical cash.
Learn more: Atlantic Council — CBDC Tracker
