Stablecoin Policy and Investment: GENIUS Act, MiCA, and the $2 Trillion Market

Stablecoins are the infrastructure layer of tokenized finance. Every DeFi protocol, every tokenized asset settlement, every cross-border payment using digital currency, every institutional cash management product on blockchain — all of these depend on stablecoins as their medium of exchange. The $200B+ stablecoin market of 2025 is the foundation on which the tokenization economy is built. The two regulatory frameworks that govern its future — the GENIUS Act in the United States and MiCA in Europe — will determine who captures the value as that market grows toward the $2T projections for 2028.

The Stablecoin Market Today

Tether (USDT) holds approximately 70%+ of the stablecoin market by capitalisation, making it the dominant instrument in global crypto markets. USDC, issued by Circle, is the second largest, with particular strength in regulated and institutional markets. Together, USD-denominated stablecoins represent roughly 95%+ of total stablecoin market capitalisation.

This concentration in USD-denominated instruments is both a reflection of the dollar’s global reserve currency status and a structural advantage for US-connected issuers: the demand for digital dollars is enormous, growing, and not dependent on USD stablecoin issuers maintaining compliant operations in every jurisdiction. Tether, incorporated offshore, serves global demand with minimal direct US regulatory exposure — though that position faces increasing pressure.

The growth trajectory is compelling: from $10B in 2020 to $200B+ in 2025, the stablecoin market grew 20x in five years. If it grows another 10x to $2T by 2028 — as JPMorgan, Citi, and multiple investment banks have projected in research reports — the regulatory frameworks governing that market will determine which issuers capture the value.

GENIUS Act: Who Can Issue in the United States

The GENIUS Act (signed July 18, 2025) establishes a federal licensing framework for “payment stablecoins” in the United States. The key eligibility and compliance requirements define the market structure.

Eligible issuers include: insured depository institutions (banks and credit unions), federally chartered or state-chartered non-bank payment stablecoin issuers, and subsidiaries of these entities. This issuer eligibility framework explicitly creates a path for major banks to issue payment stablecoins — a provision that opens the market to JPMorgan, Bank of America, and other systemically important financial institutions that have been exploring stablecoin issuance.

Reserve requirements specify that payment stablecoins must be backed 1:1 with high-quality liquid assets: US currency, Treasury bills with short maturities, Federal Reserve deposits, or central bank reserve balances. These requirements align with Circle’s USDC reserve management practices and create material compliance challenges for Tether’s offshore reserve structure, which historically included commercial paper and other instruments that do not qualify under the GENIUS Act framework.

Circle emerges as the clearest winner from GENIUS Act enactment. USDC’s structure — full reserve backing in short-duration Treasuries and cash equivalents, regular third-party attestations, transparent reserve disclosures — was essentially the template the GENIUS Act requirements reflect. The Act validates Circle’s compliance investment and creates a legal framework that USDC already satisfies.

Tether’s position in the US market is more complex. Tether does not currently satisfy GENIUS Act requirements as an issuer, which limits its ability to directly serve the US institutional market that the Act creates. Tether’s global offshore market — the 70% of crypto markets that rely on USDT — is not directly regulated by the GENIUS Act. The competitive risk for Tether is displacement in US-regulated markets by GENIUS Act-compliant issuers, not immediate disruption of its offshore market.

MiCA’s Stablecoin Framework: ART vs EMT

MiCA distinguishes between two stablecoin categories with materially different regulatory treatment.

E-money tokens (EMTs) are stablecoins pegged to a single official currency. They must be issued by an entity authorised as an electronic money institution (EMI) under EU law. Reserve requirements require full backing with segregated, protected assets. EMTs are the category that captures most USD and EUR stablecoins used for payment purposes.

Asset-referenced tokens (ARTs) are stablecoins pegged to a basket of assets — multiple currencies, commodities, or other assets. They face more stringent requirements than EMTs: higher capital requirements, mandatory reserve asset disclosures, and restrictions on significant ART issuers (those exceeding transaction volume thresholds face enhanced supervision by the European Banking Authority rather than just national competent authorities).

Tether’s USDT faces challenges under both frameworks. As a USD-pegged stablecoin, USDT would need to be issued by an EU-authorised EMI to be sold as an EMT to EU customers. Tether’s current structure does not satisfy this requirement. The practical consequence: Tether cannot market USDT to EU retail customers as a MiCA-compliant product, limiting its EU market access.

Circle’s strategic response was to create EURC — a EUR-denominated stablecoin issued by Circle’s EU-authorised entity, qualifying as an MiCA-compliant EMT. This positions Circle to capture EUR-denominated stablecoin demand in the EU market that Tether cannot fully serve under MiCA.

The Investment Thesis: Regulated Infrastructure Plays

The investment thesis emerging from GENIUS Act and MiCA analysis is not primarily about owning USDC versus USDT — these instruments are not typical investment vehicles. It is about the infrastructure layer that regulated stablecoin compliance requires.

As GENIUS Act-compliant stablecoin issuance scales, the demand for: reserve custody services (short-duration Treasury custody at institutional scale), compliance audit and attestation services, payment processing infrastructure that interfaces with compliant stablecoins, and banking infrastructure for stablecoin issuer settlement accounts — all of this grows proportionally. These are investable infrastructure businesses whose growth is directly driven by the regulatory frameworks that mandate their use.

Similarly, as MiCA’s EMT requirements scale, demand for EMI licensing services, EU reserve custodians, and MiCA compliance technology grows. The compliance build-out play — investing in the infrastructure that GENIUS Act and MiCA-compliant stablecoin issuers must use — is the regulatory framework investment thesis expressed through the infrastructure layer rather than the issuer layer.

The $200B market growing to $2T is not just an asset growth story. It is a regulatory compliance build-out story. And that build-out requires infrastructure investment that is proportional to the market size it serves.