Stablecoin Market Cap Surpasses $300 Billion —

Why it matters: The stablecoin market cap surpassing $300 billion signifies that the "waiting capital" within the crypto asset ecosystem has reached an all-time high. However, its composition is fundamentally different from the DeFi bubble of 2021. Growth is driven not by trading speculation, but by real demand for international remittances, inter-company settlements, and the dollarization of emerging economies, a trend made irreversible by the passage of the U.S. GENIUS Act. For banks, an existential crisis of deposit outflow is quietly unfolding.

📝 SUMMARY: Stablecoin market capitalization has exceeded $300 billion, a sign not of 2021-style speculative money, but of the simultaneous progression of the dollar's digital expansion and a structural outflow of bank deposits.

What Happened

• Market Cap — The total market capitalization of stablecoins reached $312 billion, growing sixfold from approximately $50 billion in early 2020.
• Market Structure — USDT accounts for $184 billion (60.7% share) and USDC for $75.7 billion (24% share), forming an oligopoly where the top two assets comprise 93% of the total.
• Transaction Volume — Stablecoin transaction volume is projected to reach $33 trillion in 2025, exceeding the combined total of Visa and Mastercard, representing a 72% year-over-year increase.
• GENIUS Act — The first comprehensive U.S. stablecoin regulation signed on July 18, 2025, mandating 1:1 reserves, backing by short-term Treasury bills, and monthly disclosures.
• Bank Initiatives — JPMorgan, Bank of America, Citigroup, and Wells Fargo are reportedly considering issuing a joint stablecoin.

The Big Picture

Historical Context

The history of stablecoins is the history of "trust" in the crypto asset market itself. When Tether emerged in 2014, it was merely a "convenient tool" to streamline fund transfers between exchanges. Following the DeFi Summer of 2020, stablecoins grew explosively as a base currency for liquidity provision, leveraged trading, and yield farming, reaching $150 billion by December 2021.

However, in May 2022, the collapse of algorithmic stablecoin UST/Luna changed everything. $45 billion evaporated in a week, proving that "stability without reserves" was an illusion. In March 2023, the SVB collapse caused USDC to temporarily depeg to $0.86, leaving the lesson that "reserves held in banks are not safe either."

These two crises determined the current structure of the stablecoin market. Algorithmic stablecoins virtually disappeared, and fiat-backed stablecoins became dominant. The GENIUS Act of 2025 legally mandated 1:1 reserve backing and investment in short-term Treasury bills of 93 days or less, formally positioning stablecoins as "regulated digital dollars." What was once a gray area has now become part of the U.S. financial infrastructure.

It is noteworthy that this institutionalization is not accidental but a strategic choice. The Trump administration explicitly positioned stablecoins as a "mechanism for maintaining dollar hegemony" through an executive order. The European Central Bank's caution regarding the spread of dollar-denominated stablecoins in the Eurozone as "digital dollarization" is evidence that this strategy has begun to take effect.

Stakeholder Map

Structural Insights from Data

• $312 Billion — Total market capitalization of stablecoins. Grew approximately sixfold from early 2020.
• $33 Trillion — Projected annual stablecoin transaction volume in 2025, exceeding the combined total of Visa+Mastercard.
• 93% — Combined market share of USDT and USDC, a de facto duopoly.
• $141 Billion — Tether's holdings of U.S. Treasuries, making it one of the world's largest holders of U.S. government debt.
• Over $10 Billion — Tether's net profit in 2025, with Treasury yields from reserves being the primary revenue source.
• $6.6 Trillion — U.S. Treasury estimate of bank deposits potentially flowing into stablecoins.
• $226 Billion — Stablecoin usage in B2B payments, approximately 60% of the total.
• 0.39% — Average U.S. deposit interest rate, a significant difference from stablecoin yields of 3.5% or more.

Reading Between the Lines — What the News Isn't Saying

The most crucial aspect behind this "$300 billion breakthrough" is that the phase where stablecoins exist solely for crypto assets is coming to an end. 60% of transaction volume is B2B payments, remittance costs have dropped from a traditional 6.5% to less than 2%, and Visa and PayPal are deploying their own stablecoins. This means stablecoins are no longer "waiting capital for crypto assets" but are now competitors to existing international remittance and payment infrastructures. Furthermore, by limiting reserves to short-term Treasury bills, the GENIUS Act is designed such that the more the stablecoin market expands, the more structural buyers of U.S. Treasuries emerge. The real reason the U.S. government welcomes stablecoins is not consumer protection or innovation promotion, but the alignment of geopolitical interests: global expansion of the dollar-denominated payment network and stabilization of Treasury demand. The ECB's warning about this structure as "digital dollarization" is precisely because they understand the true nature of this game.

NOW PATTERN

Path Dependency × Contagion Cascade

The institutionalization of stablecoins by the GENIUS Act creates an irreversible path, and its effects are cascading into bank deposits, the Treasury market, and emerging market currencies.

Path Dependency: The Path Taken by the "Digital Dollar" is Irreversible

The enactment of the GENIUS Act solidified an irreversible path of stablecoin "institutionalization." The question is, where is this path leading?

Path Dependency is a dynamic where initial choices constrain subsequent options, making a change in direction structurally impossible beyond a certain point. For stablecoins, that turning point was the signing of the GENIUS Act in July 2025.

What makes this law decisive is that it defined stablecoins not as a "threat to be regulated" but as "infrastructure to be utilized." The 1:1 reserve backing requirement, the restriction to invest in short-term Treasury bills of 93 days or less, and monthly disclosure obligations — these might seem like "stricter regulations" at first glance. However, the essence is the opposite. It granted "permission" for anyone to legally issue digital dollars, provided they adhere to these rules.

There are three reasons why this path is irreversible. First, Tether has become one of the world's largest bond investors, holding $141 billion in U.S. Treasuries. The U.S. government no longer has an incentive to stop Tether's Treasury purchases. Second, Circle has transformed the cost of regulatory compliance into a competitive advantage as the sole major issuer compliant with both the GENIUS Act and EU MiCA. Latecomers cannot withdraw until they recoup this investment. Third, the fact that the top four U.S. banks, including JPMorgan, are considering issuing a joint stablecoin. The moment banks shifted from being "competitors" to "participants" in stablecoins, the market's continued existence became guaranteed by the vested interests of the financial system.

Even more importantly, the GENIUS Act stipulates that only authorized entities can issue stablecoins after January 18, 2027. This means the regulatory gate is designed to open and then close. If one does not get on this path now, there is a possibility of never being able to. Circle's successful IPO (up 675% post-listing) is a result of the market accurately pricing in this irreversibility.

Contagion Cascade: The $300 Billion Domino Effect Will Topple Banks, Treasuries, and Monetary Sovereignty in Sequence

The growth of stablecoins is not confined to internal events within the crypto asset market. A cascading effect is beginning to spread contagiously to bank deposits, the Treasury market, and the monetary sovereignty of emerging nations.

A Contagion Cascade is a dynamic where a change in one domain, once it crosses a threshold, spreads to adjacent domains at an unexpected speed. The stablecoin market cap surpassing $300 billion signifies the crossing of that threshold.

The first domino is bank deposits. The U.S. Treasury estimates that up to $6.6 trillion in bank deposits could flow into stablecoins. The current average U.S. deposit interest rate is 0.39% (checking accounts are 0.07%). Meanwhile, crypto exchanges offer yields of 3.5% or more on stablecoin deposits. This interest rate differential represents a shift for individual depositors to stablecoins as a "rational choice." Oliver Wyman's analysis asking "Will stablecoins destroy the banking business?" is not a rhetorical question.

The second domino is the U.S. Treasury market. By limiting reserves to short-term Treasury bills, the GENIUS Act means that if the stablecoin market expands to $1 trillion, new structural buyers of short-term Treasuries will emerge, totaling hundreds of billions of dollars. According to analysis by the Brookings Institute, stablecoin issuers purchased approximately $40 billion in short-term Treasuries in 2024, pushing down 3-month yields by 2-2.5 basis points. For the U.S. government, this is an "ally" that helps finance the fiscal deficit.

The third domino is the monetary sovereignty of emerging nations. Over 90% of stablecoins are dollar-denominated, and in Latin America, 71% of respondents use stablecoins for international remittances. An ECB advisor warned that the spread of dollar-denominated stablecoins in Europe "replicates patterns observed in dollarized economies." For emerging market central banks, the choice between blocking a convenient remittance method or accepting the erosion of monetary sovereignty is a lose-lose proposition.

The reason this cascade is unstoppable is that each stage forms a feedback loop that reinforces the next: bank deposits flow into stablecoins → Treasury demand increases → the U.S. government supports stablecoins → regulatory legitimacy grows → more deposits flow. Now that this loop has begun to turn, reversing individual dominoes means unwinding the entire system.

Intersection of Dynamics

Path dependency and contagion cascade intersect in a mutually reinforcing manner. The institutional choice of the GENIUS Act fixes a path, and each time stablecoins grow along this fixed path, the cascading effects on banks, Treasuries, and monetary sovereignty expand. And each stage of the cascade (banks entering stablecoins, the U.S. government welcoming Treasury demand, the digital dollarization of emerging nations) further entrenches the path.

At the intersection of these two dynamics lies the historical project of "reinventing the dollar." Stablecoins began as a crypto asset innovation, but the true engine of their growth is their convergence with the U.S. national strategy to extend its monetary hegemony into the digital space.

The $300 billion mark is merely a waypoint. If Standard Chartered's prediction of $2 trillion by 2028 materializes, stablecoins will become a structural pillar of the U.S. Treasury market, and discussing them under the category of "crypto assets" will itself become obsolete.

Pattern History

2022: UST/Luna Collapse — The "Death" of Algorithmic Stablecoins Shaped the Current Market Structure

In May 2022, algorithmic stablecoin UST and its sister token LUNA evaporated $45 billion in a week. UST depegged from $1 to $0.20, and LUNA crashed from $87 to below $0.00005. The unsustainable 19.5% annual yield of Anchor Protocol attracted massive funds, and the moment trust collapsed, a death spiral of UST redemption → massive LUNA issuance → LUNA crash → further UST depeg ensued. This event imprinted the lesson "stability without reserves does not exist" on the market, effectively eliminating algorithmic stablecoins.

Structural Similarity to Today: The UST collapse solidified the path that "only fiat-backed stablecoins will survive," and the GENIUS Act of 2025 legislated that path. Without the 2022 crisis, the legislative legitimacy for a 1:1 reserve requirement would not have been gained. Crisis begets regulation, and regulation fixes market structure — a typical mechanism of path dependency.

2023: SVB Collapse and USDC Depeg — "Reserves Held in Banks Are Not Safe Either"

On March 11, 2023, following the collapse of Silicon Valley Bank, it was revealed that Circle had $3.3 billion (approximately 8% of its reserves) deposited at SVB. USDC temporarily depegged to $0.86, and DAI and FRAX were also affected in a chain reaction. Access to the banking system was unavailable over the weekend, amplifying the panic. The following Monday, the federal government announced full protection for SVB depositors, and USDC regained its peg within days. This incident demonstrated that "even with adequate reserves, one is not immune to banking risk," and that "government intervention is essential for stablecoin stability."

Structural Similarity to Today: The SVB crisis exposed the interdependence of stablecoins and the banking system, reinforcing the need for reserve diversification requirements and government oversight in the GENIUS Act. Simultaneously, the precedent that "government intervention leads to recovery" paradoxically strengthened the institutional legitimacy of stablecoins. This is a rare example showing that a contagion cascade can also work "upwards."

2024: Birth of the Eurodollar Market (1957) — A Precedent for Offshore Dollars

In 1957, during the Cold War, the Soviet Union, fearing the freezing of its dollar assets within the U.S., began holding dollar-denominated deposits in London banks, which is considered the origin of the Eurodollar market. Because U.S. regulations (Regulation Q) limited domestic deposit interest rates, higher rates were offered in unregulated London, leading to a global outflow of dollars offshore. By the 1980s, the Eurodollar market grew to trillions of dollars, fundamentally changing the transmission mechanism of U.S. monetary policy. As a result, the U.S. government accepted this market not as a "threat" but as an "extension of dollar hegemony."

Structural Similarity to Today: The structural similarities between stablecoins and the Eurodollar market are strikingly high. Both are dollar-denominated financial products born from regulatory gaps, creating a "shadow dollar zone" outside the U.S. The reason the U.S. government ultimately tolerated (and even supported) this is also the same — anything that expands the scope of dollar usage strengthens dollar hegemony. The GENIUS Act can be said to be legislation that consciously applied the lessons of the Eurodollar.

Patterns Revealed by History

The history of stablecoins is a repetition of the pattern: "crisis determines the path, the path creates institutions, and institutions accelerate the cascade." The UST collapse made reserve backing mandatory, the SVB crisis justified government oversight, and the GENIUS Act made the "digital dollar" an official infrastructure. And the precedent of the Eurodollar market suggests a future where this path is ultimately absorbed as a reinforcement of U.S. hegemony. The attainment of $300 billion is not the "completion" of this pattern, but the beginning of its "acceleration."

Future Scenarios

Optimistic Scenario (Probability: 25%)

With the smooth enforcement of the GENIUS Act and progress in MiCA compliance, the stablecoin market reaches $1 trillion by the end of 2027. Banks' entry into stablecoins increases options for depositors, and international remittance costs fall below an average of 2%. Digital dollar hegemony is established, reducing the need for CBDCs.

Investment/Action Implications: An opportune time to build long positions in stablecoin-related assets (e.g., Circle) and Ethereum (benefiting as a settlement layer).

Base Scenario (Probability: 55%)

Regulatory development for the GENIUS Act is completed as scheduled in July 2026, but competition with banks for deposits becomes a political issue. The stablecoin market grows to $500-700 billion by 2027, but growth slows due to stricter yield regulations and KYC requirements. The regulatory compliance gap between Tether and Circle triggers market restructuring.

Investment/Action Implications: USDC/Circle-focused positions. Monitor Tether's regulatory risks while focusing on real-demand assets that utilize stablecoins as infrastructure for international remittances and B2B payments.

Pessimistic Scenario (Probability: 20%)

Due to a banking lobby backlash, the implementing rules of the GENIUS Act are tightened, leading to a sharp increase in cost burdens for non-bank issuers. Regulations are introduced that effectively exclude Tether from the U.S. market, temporarily fragmenting stablecoin market liquidity. Alternatively, a new depeg event becomes a pretext for stricter regulations, causing market growth to stagnate for 2-3 years.

Investment/Action Implications: Reduce exposure to stablecoin-related assets. Monitor the banking sector's digital currency strategies and wait until the regulatory environment stabilizes.

Key Triggers to Watch

• GENIUS Act Rulemaking Deadline: July 18, 2026 — Obligation to formulate detailed rules within one year of enforcement.
• EU MiCA Full Enforcement: July 1, 2026 — Full application of crypto asset regulations within the EU.
• Tether Reserve Audit Report: Q1 2026 (by end of March) — First reserve disclosure under the GENIUS Act.
• U.S. Banks Joint Stablecoin Announcement: Within 2026 — Materialization of the joint project by JPMorgan and four other banks.
• CLARITY Act Senate Vote: First half of 2026 — Legislative resolution of SEC/CFTC jurisdiction.

Tracking Points

Next Trigger: July 18, 2026, GENIUS Act rulemaking deadline — If detailed implementing rules are not published by this date, the legal status of the stablecoin market will become unstable. Its simultaneous progression with the full enforcement of EU MiCA on July 1 of the same month will be a watershed moment for global regulatory restructuring.

Continuation of this Pattern: Stablecoins × Dollar Hegemony Series — Next tracking theme: The specific design of the U.S. banks' joint stablecoin and its impact on the existing USDT/USDC ecosystem. When banks enter as players, will "crypto asset infrastructure" transform into "banking infrastructure"?

Source:

• CoinDesk