The fierce rivalry between the leading stablecoins USDT and USDC has entered a new phase in the cryptocurrency market. Tether’s USDT has long dominated as the largest digital dollar in circulation, but USDC, issued by the US financial technology firm Circle, is gaining impressive momentum. While the latest figures confirm USDT’s position at the top by market capitalization, USDC is rapidly expanding its presence in payments, institutional settlements, and fast on-chain transfers.
Divergence in Market Share and Trading Volume
The total size of the stablecoin market has now reached $315 billion, with Tether’s USDT commanding a 58% market share as the largest by supply. Raw issuance numbers alone, however, do not tell the whole story. Where value flows—namely, which stablecoins are used for active transactions and which entities are ramping up infrastructure—determines how new capital enters the sector.
Circle’s financial reports reveal that USDC’s outstanding supply grew to $75 billion by the end of 2025, marking a robust 72% annual increase. On-chain transaction volume for USDC soared to $12 trillion in the most recent quarter alone, representing a 247% year-on-year surge. Meanwhile, Tether reported its USDT supply surpassed $186 billion, with reserve assets nearing $193 billion and its US Treasury holdings standing at approximately $141 billion.
USDC’s market capitalization climbed by nearly 8% last month, reaching a record $79 billion. Though Tether remains far larger overall, its supply lingers roughly $3 billion below its December 2025 all-time high of $187 billion. USDT continues to lead in total issuance, but USDC is accelerating its pace in volume and innovative use cases.
Institutional Integration and Regulatory Drivers
USDC’s swift ascent is closely linked to its compatibility with institutional payment systems and strong regulatory compliance. Circle’s transparent reserve model, regular financial disclosures, and routine audits make USDC an appealing choice for major traditional financial institutions. According to Circle, most USDC reserves are managed through a BlackRock-run fund, while the remainder is held as cash by regulated entities—Deloitte audits the financial statements and affirms adherence to regulatory standards.
These developments are motivating more institutions to opt for USDC. For instance, payments giant Visa now handles stablecoin settlement operations using USDC in the US, routinely processing around $3.5 billion in annual transaction volume. On the regulatory side, new US initiatives such as the GENIUS Act have introduced stricter requirements for issuers with over $50 billion outstanding, mandating rigorous reserve management, monthly disclosures, and independent annual audits.
“The majority of USDC’s reserves are maintained in the Circle Reserve Fund managed by BlackRock. Our financial statements are audited by Deloitte, and we adhere strictly to regulatory standards,” Circle stated.
Liquidity, Bitcoin, and Future Outlook
Stablecoins have established themselves as the backbone of liquidity across the crypto ecosystem. Their utility is indispensable for Bitcoin and other major digital assets, streamlining exchange balances, collateral management, and round-the-clock value transfers. While USDT’s global distribution network remains vital for emerging markets and exchanges, Circle’s transparent reserve approach and regulatory alignment are making USDC more attractive to banks and institutional investors.
Analytics platform Glassnode highlights the “Stablecoin Supply Ratio” metric, which measures the purchasing power of stablecoin supplies compared to Bitcoin. According to their analysis, greater stablecoin balances signify an influx of new buying power for the crypto market. Separately, Standard Chartered forecasts that the stablecoin sector could balloon to $2 trillion by the end of 2028.
Going forward, Tether is likely to remain the primary stablecoin for global trade and exchanges, while USDC may see increased traction among regulated payment systems and institutional clients. As regulatory clarity improves and more banks integrate with stablecoin infrastructure, USDC’s momentum in transaction activity could lead to a higher share of total supply. Nonetheless, USDT is expected to retain its status as the principal dollar-pegged asset across crypto exchanges.
The latest data signals that the stablecoin market could soon witness rapid transformation. Tether’s extensive reach and dominance across exchanges keep it firmly in the lead, yet Circle is quickly expanding its footprint in institutional investments and regulated financial transactions.
