Podcast 155: CBDC: What you need you know?

Most people working in fintech cannot answer a simple question: in how many forms can €100 exist right now?

The honest answer is five. Cash. Retail bank balance. Electronic money institution balance. Stablecoin. Central Bank Digital Currency.

Each one operates under a completely different model of custody, regulation, and risk. And the fifth — CBDC — is about to change how the other four relate to each other.

This episode of the Fintech Garden Podcast steps away from the usual interview format. Igor Tomych and Dumitru Condrea sit down for a structured explainer on CBDC: what it is, where it is, and what the next three years actually look like.

Money Has Quietly Become Five Different Things

Cash is what most users still picture when they think of money. Tangible, transferable, anonymous, no intermediary.

Retail bank balances look like money but are not money in the same sense. They are a claim on a regulated institution that holds reserves at a fractional ratio. The €100 in a Barclays account is not backed 1:1 by physical cash; it is backed by the bank’s balance sheet and the regulatory regime around it.

Electronic money institution balances — the kind issued by neobanks and payment institutions — are different. Regulators require 1:1 backing. Every euro on the user’s screen exists as actual euros held in reserve.

Stablecoins exist outside the regulated banking system entirely. They are tokens on a blockchain, sometimes backed by audited reserves, sometimes not. Decentralized rails, centralized minting.

CBDC is none of the above. It is issued by the central bank. It is regulated by specific legislation. And — critically — the user can hold it themselves.

That last property is what makes it new.

Centralized Rails, Self-Custody Design

The most common confusion in CBDC discussions is the assumption that it is essentially a government-issued stablecoin. It is not.

Stablecoins run on decentralized blockchain rails. Consensus mechanisms govern transactions. Minting happens at a centralized issuer, but the network state is distributed.

CBDC inverts the model. Rails are centralized — controlled by the central bank — but the user holds custody of their funds in personal wallets, can transact offline, and does not require an intermediary for every transaction.

This is a hybrid that does not have a clean historical precedent. It is not cash. It is not a bank deposit. It is not a stablecoin.

It is something genuinely new.

Wholesale Will Come Before Retail

Most public discussion of CBDC focuses on consumer use cases. In practice, the wholesale layer is where deployment starts.

Wholesale CBDC is the version used between commercial banks and the central bank for settlement. It does not require KYC at the user level, anti-money laundering frameworks at the consumer scale, or any of the retail infrastructure that makes a public rollout politically and operationally heavy.

Switzerland’s Project Helvetia has already demonstrated it. Settlement times collapse from T+1 or T+2 to instant. Interbank liquidity costs drop. The operational case is clear.

Retail CBDC will follow, but the wholesale infrastructure is what unlocks the real operational change first.

That sequencing matters for product teams building anything in payments, treasury, or settlement.

Five Countries Are Already Live

The Atlantic Council CBDC Tracker is the cleanest public reference for global status. Five jurisdictions have moved past pilots into operational retail deployment.

Nigeria, with the eNaira, framed CBDC as an economic activation tool — bringing more of the population into the digital financial system.

The Bahamas, with the Sand Dollar, and Jamaica, with JAM-DEX, used CBDC to address financial inclusion across distributed island geographies where physical banking infrastructure is expensive.

China’s e-CNY, still technically a pilot, operates at full deployment scale and represents the largest CBDC transaction volume globally. It works because China’s payment culture is already dominated by digital wallets through WeChat Pay and Alipay.

None of these is a perfect analog for what Europe will deploy. But all of them are operational data.

Europe Is Moving Fast — and the Reason Is Geopolitical

The pace of the digital euro project has surprised most observers. The reason is not technical urgency. It is geopolitics.

The current US administration has pivoted toward USD-pegged stablecoins as a strategic instrument. The argument from Washington’s side is that private dollar-denominated stablecoins extend dollar dominance through software, without requiring a banking system buildout in every market.

For Europe, this is a sovereignty problem. If global payment flows run on USD stablecoins, European monetary sovereignty erodes.

The response is the digital euro, framed less as a technology project than as a strategic counter. Legal framework targeted for 2026. Real-environment testing in the second half of 2026. Broader rollout aimed at 2029 to 2030.

This is no longer the slow lane.

GDPR Is the European Differentiator

A persistent concern about CBDC is the loss of financial privacy.

China’s model offers limited reassurance — payment transparency is a feature, not a bug, for that government. The European model is being designed to land differently.

The architecture under discussion is what the hosts describe as zero anonymization with two layers:

The payment service provider — the user’s bank — sees who is transacting. KYC sits where it already sits. The European Central Bank sees only pseudonymous identifiers. It can monitor flows without seeing identities.

This is not the same as cash anonymity. It is closer to how SEPA handles transaction visibility, applied to a new instrument.

Whether users find this sufficient is a separate question. But the architectural intent is meaningfully different from CBDC implementations elsewhere.

Card Networks Are Structurally Exposed

This is the part of the conversation that most fintech commentators are not making explicit.

If the digital euro launches as a real-time, secure, regulated instrument integrated into the European payment network, it creates an alternative rail that bypasses card schemes entirely.

Merchants pay no interchange. Settlement happens instantly, not T+2. Compliance simplifies to a single ECB framework rather than multiple card scheme rulebooks.

SEPA has already proved that Europe can build a payment infrastructure outside SWIFT. The digital euro could repeat that pattern at the card-network layer.

Visa and Mastercard built their position in a payment world without state-issued digital alternatives. That world is ending.

The market response will not be immediate. Card networks have deep integration with consumer behavior, merchant acquiring, and existing rails. But the structural advantage they have enjoyed for fifty years is no longer permanent.

Offline Is the Engineering Problem

The hardest technical question in CBDC design is offline functionality.

Cash works offline by definition. CBDC needs to work offline without internet, without the central system, and without enabling double-spending.

The likely architecture is device-to-device transactions secured by cryptographic signing. The vaccine QR code system used during COVID is a usable mental model — a signed token that can be verified offline against a public key, then reconciled with the central database when connectivity returns.

The open design questions are real.

How much volume can flow offline before the system requires reconnection? How are compromised devices identified and excluded? What trust scoring governs whether an offline transaction is accepted at full priority? How is the double-spend problem prevented when two offline transactions might claim the same token?

These are solvable. They are also not solved yet.

For engineering teams that may eventually integrate CBDC, this is where the architectural complexity will live.

History Rhymes With Diners Club

In 1950, Diners Club introduced the first credit card. The questions that arose looked very similar to the ones being asked about CBDC now.

How will this work offline? What happens during outages? Why should users trust a new payment instrument?

Those questions were solved, slowly, over decades. The underlying paradigm — pay now, settle later, through a network — reshaped global commerce.

CBDC is at the equivalent moment. The technology will be solved. The architecture will be standardized. The user experience will improve.

The harder work is regulatory design, public trust, and operational rollout. That work is what the next three years are for.

And there is one open question that even the hosts leave rhetorical at the end of the episode.

What happens to digital money during a blackout?

Europe just lived through one. The answer is not yet built. But it has to be.