In recent years, an increasing number of central banks globally have actively devoted resources to the research, pilot testing, or official issuance of central bank digital currencies (CBDCs). Although decentralized crypto assets such as Bitcoin historically provided important inspiration for the development of distributed ledger technology and demonstrated the potential of digital assets, the primary motivation for central banks to advance fiat digital currencies stems from profound considerations regarding optimizing national payment systems, safeguarding financial stability, and enhancing the transmission efficiency of monetary policy.
Enhancing Domestic Payment Efficiency and Reducing Cash Costs
In traditional fiat currency systems, the printing, transportation, storage, counting, and anti-counterfeiting destruction of physical cash consume massive social resources. In some countries, the full lifecycle management cost of cash accounts for a significant proportion of Gross Domestic Product (GDP). By introducing fiat digital currencies, central banks can substantially curtail cash logistics costs. Meanwhile, digital currencies possess programmability and instant clearing characteristics, which can markedly improve the operational efficiency of domestic retail payment systems and reduce settlement friction in commercial transactions.
Addressing Competitive Challenges from Private Cryptocurrencies and Stablecoins
With the rapid development of Bitcoin and various private stablecoins, they pose a potential external thrust to the status of traditional sovereign currencies. If private digital tokens—particularly those led by large technology companies or circulated internationally—are widely accepted, they could weaken a central bank's control over money supply and interest rate transmission, and even challenge sovereign seigniorage and financial stability. Deploying fiat digital currencies helps central banks continue to consolidate the central position of sovereign currencies in the digital economy era.
Improving Cumbersome Cross-Border Payment Processes
Traditional cross-border remittances and trade settlements typically rely on lengthy correspondent banking chains, generally suffering from pain points such as cumbersome processes, high intermediary fees, and long arrival times. Multi-lateral central bank digital currency projects (such as international cooperative initiatives like mBridge) leverage distributed technology and direct inter-bank connections to explore the feasibility of achieving peer-to-peer or multi-lateral near-real-time cross-border settlement, thereby significantly lowering the cost and time expenses of cross-border capital flows.
Promoting Financial Inclusion
In many countries and regions, a considerable portion of the population still struggles to access basic financial services such as bank accounts due to remote geographical locations or a lack of traditional credit histories. With the popularization of mobile terminals like smartphones, central bank digital currencies can provide vulnerable groups with secure, convenient, and low-threshold digital payment tools, incorporating more unbanked residents into the modern digital economy system and enhancing the overall inclusive level of financial services.
Fundamental Differences Between Fiat Digital Currencies and Bitcoin
Although the birth of central bank digital currencies was inspired by the development of blockchain and cryptographic technology, fundamental differences exist between the two in economic attributes and legal frameworks. Bitcoin is a digital asset operating in a decentralized manner with a hard-coded total supply cap, lacking national credit backing and exhibiting volatile prices; whereas a central bank digital currency (CBDC) is essentially a direct liability of the central bank, functioning as fiat money backed by national sovereign credit. Its legal status and nominal value are completely identical to paper currency, and it does not possess the price-speculative fluctuation attributes characteristic of Bitcoin.
