Stablecoins & CBDC: The Battle for Settlement Rails Stablecoins, facts. Total market capitalization

$314.68B as of 21/06/2026 (382 issuers, DefiLlama), ~$323B at all-time high in May 2026, with remarkable resilience during a crypto bear market of -48%. Concentration: USDT $186.35B (59.22%) and USDC ~$77B = 83.02% of the market. USDC: +28% outstanding in Q1 2026, on-chain volume +263% to $21,500B.

The market processed >$33,000B in on-chain transactions in 2025, exceeding Visa’s annual volume. US regulation (GENIUS Act, law of 18/07/2025): final OCC/Treasury rules targeted for 18/07/2026, full enforcement January 2027; 1:1 reserve in cash/Treasuries, monthly third-party attestations, BSA financial institution status for issuers. EU: MiCA applicable, distribution of unauthorized stablecoins prohibited to CASPs. Hong Kong: ordinance in effect since 01/08/2025, first two HKMA licenses in April 2026.

CBDC, facts. Digital euro: European Parliament voted its position at ~70%, trilogue started in July 2026; 36 PSPs selected for a 12-month pilot starting H2 2027 (launch September 2027), first potential issuance in 2029; estimated bank investment cost €4-5.8B over four years (~3.4% of significant banks’ annual IT budget).

In parallel, the ECB is building Pontes (interoperable DLT bridge with Target Services, go-live end of 2026) and Appia (integrated European DLT capital markets, long-term). Strategic reading. Two competing regimes: the US model privatizes issuance (regulated stablecoins = quasi-narrow banks); the European hybrid model keeps the central bank at the top (CBDC) while licensing private initiative (EMT/CASP).

The billion-dollar point of attention: the “2 to 4 issuers” consolidation anticipated by nearly all 2026 forecasts concentrates rail risk, for any RWA portfolio whose rent is paid in stablecoins, the choice of issuer is a counterparty risk decision, hence the value of continuous scoring like SSSI. Banking analyst projections: $1,000-2,000B addressable stablecoin market by 2030 if GENIUS↔️MiCA interoperability.