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Lesson 2 · 2 min · Intermediate

What a CBDC is, and why central banks want one

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CBDC vs. crypto vs. stablecoins vs. FedNow — what's the difference?

These get conflated, but the differences matter:

  • Crypto (Bitcoin, Ethereum): decentralized, public chains, no central issuer, supply/rules in code, pseudonymous users.
  • (USDC, USDT): privately issued tokens pegged to a fiat asset, redeemable against private reserves. The issuer, not the central bank, is the counterparty.
  • CBDC: central-bank-issued digital fiat. The central bank is the direct counterparty (a liability on its balance sheet), typically on a permissioned ledger.
  • (US, 2023): a real-time retail payment infrastructure, not a CBDC. It moves commercial-bank money instantly 24/7; the Federal Reserve has not issued a digital dollar.

Who stands behind the money

Cryptono central issuerrules in codepublic chainsyour claim is on:no oneStablecoina private issuerredeemable againstprivate reservesyour claim is on:the issuerCBDCthe central bank’sdirect liabilityusually apermissioned ledgeryour claim is on:the central bankFedNownot a new moneya real-timepayment railmoves commercial-bankmoneyyour claim is on:your bank
What separates them is who you have a claim on: no one with crypto, a private issuer with a stablecoin, the central bank with a CBDC. FedNow isn’t a new money at all; it moves bank deposits faster.

Retail vs. wholesale: two very different CBDCs

Retail CBDCs are accessible to households and businesses for everyday payments — the digital-cash analogue. Wholesale CBDCs are restricted to financial institutions for interbank settlement and capital-market transactions; they modernize the central-bank reserve rails rather than the consumer experience. Some projects (e.g. the digital euro) are retail-led; others (e.g. mBridge) focus on wholesale cross-border settlement.

Who can hold a CBDC

Retail CBDCcentral bankhouseholds and businesseseveryday paymentse.g. the digital euroWholesale CBDCcentral bankfinancial institutionsinterbank settlement, capital marketse.g. mBridge (cross-border)households: no access
A retail CBDC reaches households and businesses as digital cash. A wholesale CBDC stays between the central bank and financial institutions, modernizing settlement rather than everyday payments.

Why central banks want their own digital cash

  • Payment modernization: faster, cheaper, programmable domestic payments — especially where legacy rails are slow.
  • Financial inclusion: a public-sector wallet can reach the unbanked without requiring a commercial-bank account.
  • Monetary sovereignty: a public alternative to private stablecoins and foreign payment rails (e.g. USDC, USDT, foreign CBDCs) helps preserve the central bank’s grip on the unit of account.
  • Policy transmission: programmable money could in principle enable targeted transfers, expiry dates, or rate-tiered balances — a capability cash cannot offer.
Programmability is a double-edged sword

The same programmability that enables instant tax refunds or expiring stimulus vouchers also enables negative rates, spending limits, or geofenced use. The policy debate is not whether the technology can do this — it can — but whether the legal framework should permit it.

Educational only, not financial or legal advice.