Stablecoin Market Cap Exceeds $300B, Signaling Digital Dollar Expansion and Bank Deposit Shift

Why it matters: The stablecoin market capitalization surpassing $300 billion means that "waiting capital" within the crypto ecosystem has reached an all-time high. However, its nature is fundamentally different from the DeFi bubble of 2021. Growth is driven by real demand such as international remittances, inter-company settlements, and the dollarization of emerging economies, and the enactment of the GENIUS Act in the US has made this trend irreversible. For banks, an existential crisis of deposit outflow is quietly unfolding.

📝 Summary: The stablecoin market capitalization has surpassed $300 billion, indicating not 2021-style speculative money, but rather 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 at $184 billion (60.7% share) and USDC at $75.7 billion (24% share), forming an oligopoly where the top two assets account for 93% of the total.
• Transaction Volume — Stablecoin transaction volume reached $33 trillion in 2025, exceeding the combined total of Visa and Mastercard. A 72% increase year-over-year.
• GENIUS Act — The first comprehensive stablecoin regulatory law in the US, signed on July 18, 2025. Mandates 1:1 reserves, backing by short-term Treasury bills, and monthly disclosures.
• Bank Movements — JPMorgan, Bank of America, Citigroup, and Wells Fargo are considering issuing a joint stablecoin.

Overall 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. After the DeFi Summer of 2020, stablecoins grew explosively as a base currency for liquidity provision, leveraged trading, and yield farming, reaching $150 billion in 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 US 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

Structure Seen Through Data

• $312 Billion — Total market capitalization of stablecoins. Grew approximately sixfold from early 2020.
• $33 Trillion — Annual stablecoin transaction volume in 2025. Exceeds Visa + Mastercard combined.
• 93% — Combined market share of USDT and USDC. A de facto duopoly.
• $141 Billion — Tether's US Treasury holdings. One of the world's largest holders of US Treasury bonds.
• Over $10 Billion — Tether's net profit in 2025. Treasury bond yields from reserves are the primary revenue source.
• $6.6 Trillion — Estimated bank deposits that could flow into stablecoins, according to the US Treasury.
• $226 Billion — Stablecoin usage in B2B payments. Approximately 60% of the total.
• 0.39% — Average deposit interest rate in the US. A significant difference from stablecoin yields of 3.5% or more.

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

The most important 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 the traditional 6.5% to less than 2%, and Visa and PayPal are deploying their own stablecoins. This means stablecoins are no longer "crypto's waiting capital" but are becoming competitors to existing international remittance and payment infrastructure. 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 US Treasury bonds emerge. The real reason the US government welcomes stablecoins is not consumer protection or innovation promotion, but rather the alignment of geopolitical interests: the global expansion of the dollar-denominated payment network and the stabilization of demand for Treasury bonds. 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 has created 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. The turning point for stablecoins was the signing of the GENIUS Act in July 2025.

This law is decisive because it defined stablecoins not as a "threat to be regulated" but as an "infrastructure to be utilized." The 1:1 reserve backing requirement, the restriction on investing in short-term Treasury bills of 93 days or less, and the monthly disclosure obligation — these might seem like "stricter regulations" at first glance. However, the essence is the opposite. They 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 US Treasury bonds. The US 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 US banks, including JPMorgan, are considering issuing a joint stablecoin. The moment banks shifted from being "competitors" to "participants" in stablecoins, the market's survival 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, they may never be 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 limited to internal events within the crypto asset market. A cascading effect is beginning to spread to bank deposits, the Treasury market, and the monetary sovereignty of emerging economies.

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 surpassing $300 billion signifies the crossing of that threshold.

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

The second domino is the US 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 Treasury bills will emerge, amounting to hundreds of billions of dollars. According to analysis by the Brookings Institute, stablecoin issuers purchased approximately $40 billion in short-term Treasury bills in 2024, pushing down 3-month yields by 2-2.5 basis points. This makes them an "ally" for the US government in financing its fiscal deficit.

The third domino is the monetary sovereignty of emerging economies. 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 US 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 the path, and each time stablecoins grow along this fixed path, the cascading effects on banks, Treasury bonds, and monetary sovereignty expand. And each stage of the cascade (banks entering stablecoins, the US government welcoming Treasury demand, the digital dollarization of emerging economies) further entrenches the path.

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

$300 billion is merely a waypoint. If Standard Chartered's prediction of $2 trillion by 2028 comes true, stablecoins will become a structural pillar of the US Treasury market, and discussing them within the "crypto asset" category itself will become outdated.

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 that "stability without reserves does not exist" on the market, effectively eliminating algorithmic stablecoins.

Structural Similarity to Current Event: The UST collapse established the path that "only fiat-backed stablecoins will survive," and the GENIUS Act of 2025 institutionalized that path. Without the 2022 crisis, the legislative legitimacy for 1:1 reserve requirements would not have been obtained. Crisis creates 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 with SVB. USDC temporarily depegged to $0.86, and DAI and FRAX were also affected in a chain reaction. Inability to access the banking system over the weekend amplified the panic. The following Monday, the federal government announced full protection for SVB depositors, and USDC recovered its peg within days. This event 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 Current Event: 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 of a contagion cascade that can also work "upwards."

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

In 1957, the Soviet Union, fearing the freezing of its dollar assets within the US during the Cold War, began holding dollar-denominated deposits in London banks, which is considered the origin of the Eurodollar market. Because US 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 US monetary policy. As a result, the US government accepted this market not as a "threat" but as an "extension of dollar hegemony."

Structural Similarity to Current Event: 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 US. The reason the US government ultimately tolerated (and even supported) this is also the same — anything that expands the use of the dollar 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 US hegemony. The $300 billion milestone is not the "completion" of this pattern, but the beginning of its "acceleration."

Future Scenarios

Optimistic Scenario (Probability: 25%)

With the smooth implementation 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, and the need for CBDCs diminishes.

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 deposit competition with banks becomes a political issue. The stablecoin market grows to $500-700 billion in 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: Positions emphasizing USDC/Circle. While monitoring Tether's regulatory risks, focus 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, sharply increasing cost burdens for non-bank issuers. Regulations are introduced that effectively exclude Tether from the US 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 1 year of enforcement.
• Full Implementation of EU MiCA: 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.
• Announcement of Joint US Bank Stablecoin: Within 2026 — Materialization of the joint project by JPMorgan and 4 other banks.
• CLARITY Act Senate Vote: First half of 2026 — Legislative resolution of SEC/CFTC jurisdiction.

Tracking Points

Next Trigger: The GENIUS Act rulemaking deadline of July 18, 2026 — 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 implementation of EU MiCA on July 1 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 joint US bank 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