Tether remains the largest stablecoin issuer by reserves and circulating supply, but Circle’s USDC is increasingly handling a larger share of the crypto economy’s transactional flow. That shift matters because stablecoins are no longer used only as parking places for traders. They now sit at the center of payments, remittances, decentralized finance, exchange settlement, and tokenized finance. Recent market data shows a split market taking shape: Tether dominates by size, while USDC is gaining ground where money actually moves.
A Stablecoin Market Dividing Into Two Leaders
The stablecoin market has grown into one of crypto’s most important sectors. Visa said fiat-backed stablecoin supply rose about 40% over the 12 months ending in April 2025, reaching more than $219 billion, while its analytics also warned that raw transaction figures can be inflated by bots, high-frequency trading, and internal exchange activity. That distinction is important when comparing USDT and USDC, because the most meaningful measures now focus on adjusted transfer volume rather than headline blockchain traffic.
Tether’s USDT still leads the market by supply. Tether said in its Q4 2025 attestation that it had record U.S. Treasury exposure of $141.6 billion and more than $6.3 billion in excess reserves, underscoring its financial scale. Circle, by contrast, says USDC reserves are held in cash, overnight U.S. Treasury repurchase agreements, and short-dated Treasuries through the Circle Reserve Fund, a structure designed to appeal to institutions and regulators.
That has created a two-speed market:
- USDT leads in supply and reserve scale
- USDC is gaining share in adjusted transfer volume
- Both tokens now dominate the broader stablecoin sector
Visa said that by October 2025, more than 97% of stablecoin supply had converged around USDT and USDC.
Why “Tether still holds more cash, but Circle’s USDC is now moving more of crypto’s money” matters
The phrase “Tether still holds more cash, but Circle’s USDC is now moving more of crypto’s money” captures a structural change in digital finance. Tether remains the balance-sheet heavyweight, but USDC is increasingly the preferred rail for on-chain transfers in parts of the market that value compliance, transparency, and integration with U.S.-linked financial infrastructure.
Artemis has previously noted that USDT is still several times larger than USDC by supply, but that USDC’s turnover is higher, meaning more transfer volume per token in circulation. That suggests USDC is being used more intensively rather than simply being held. ARK Invest, citing Artemis data as of September 30, 2025, also said USDC had the highest transaction velocity among stablecoins.
A broader industry report based on Dune and Artemis data found that stablecoin transfer volume reached $35 trillion from February 2024 to February 2025, while supply climbed to roughly $214 billion. That report also said USDC dominated total transfer volume even as USDT remained the leading stablecoin by supply.
This divergence reflects how the market is maturing. In earlier years, the biggest stablecoin often also dominated usage. Now, one token can serve as the largest reserve pool while another becomes the preferred medium for settlement and payments.
What is driving USDC’s transfer-volume gains
Several forces are helping USDC gain traction in transaction flow. First, Circle has positioned USDC as a regulated and institution-friendly product. Circle says its reserve assets are published through regular attestations and held in highly liquid instruments. That transparency has become more valuable as banks, payment firms, fintechs, and asset managers explore blockchain-based settlement.
Second, USDC is increasingly tied to mainstream payment infrastructure. Visa said its stablecoin settlement volume in the United States passed a $3.5 billion annualized run rate as of November 30, and that it had expanded USDC settlement for U.S. institutions. That does not make USDC dominant across all payments, but it shows how the token is being embedded into conventional financial rails.
Third, USDC has benefited from growth in tokenized finance and institutional crypto activity. Circle said in January 2025 that USDC circulation had risen 78% year over year. CoinDesk reported in February 2025 that USDC’s market capitalization moved above $56 billion, with Artemis data pointing to strong growth tied in part to Solana-based DeFi trading volumes.
According to Visa, adjusted stablecoin transaction volume was on track to exceed $10 trillion in 2025 after filtering out distortive activity. That kind of scale favors assets that are deeply integrated with exchanges, custodians, fintechs, and payment providers. USDC appears to be benefiting from that trend.
Why Tether still leads on reserves and market power
USDC’s momentum in transfer volume does not change Tether’s core advantage: scale. Tether remains the largest stablecoin issuer in the world, and its reserve base gives it enormous influence in both crypto markets and short-term government debt markets. Tether said its Q4 2025 attestation showed more than $10 billion in profit for 2025 and record Treasury exposure.
That reserve strength matters for several reasons. It supports liquidity on exchanges, especially in offshore and emerging-market crypto markets where USDT remains deeply entrenched. It also gives Tether a powerful earnings engine, because interest income on Treasuries and cash-like assets can be substantial when rates are elevated. Axios reported in August 2025 that Tether had posted $4.9 billion in profit in the second quarter alone on a circulating supply of $157 billion in USDT.
Academic research has also pointed to Tether’s growing footprint in Treasury markets. One 2025 paper said Tether directly held roughly $98.5 billion in U.S. Treasury bills by the first quarter of 2025, making it one of the largest non-sovereign buyers in that market.
For traders and exchanges, that scale still matters more than transaction velocity. USDT remains the default quote asset across much of global crypto trading, especially outside the United States.
What the shift means for investors, exchanges, and regulators
For investors, the split between reserve size and money movement offers a clearer way to read the stablecoin market. Market capitalization alone no longer tells the full story. A token with lower supply but higher turnover may be more important to payments, settlement, and on-chain finance than a larger rival.
For exchanges and fintech firms, the trend suggests a more segmented market ahead. USDT may remain dominant in trading liquidity and cross-border crypto markets, while USDC expands in regulated products, tokenized assets, and enterprise payments. Visa’s recent stablecoin strategy materials argue that organizations risk losing payment volume if they stay on the sidelines as blockchain-native settlement grows.
For regulators, the divergence could shape future policy. Circle’s U.S.-centric positioning and reserve disclosures may fit more easily into emerging compliance frameworks. Tether’s global reach and larger reserve base, however, mean it cannot be ignored in any serious stablecoin rulemaking discussion. The likely outcome is not a winner-take-all market, but a dual system in which each issuer dominates different use cases. That is an inference based on current supply, reserve, and transfer-volume trends.
Key takeaways
- Tether still leads by circulating supply and reserve scale
- USDC is increasingly leading in adjusted transfer volume and velocity
- Institutional adoption is helping USDC gain share in payments and settlement
- USDT remains deeply embedded in global trading and offshore crypto liquidity
- The stablecoin market is becoming more specialized rather than more concentrated
Conclusion
The stablecoin race is no longer a simple contest over who has the biggest market cap. Tether still holds more cash, more Treasuries, and more overall market share, making it the sector’s financial heavyweight. But Circle’s USDC is now moving more of crypto’s money in key parts of the market, especially where transaction velocity, institutional access, and regulated settlement matter most.
That shift does not mean Tether is losing relevance. It means the market is becoming more functionally divided. One stablecoin is acting as the largest pool of digital dollars, while the other is increasingly becoming the preferred rail for moving them. If that pattern continues through 2026, the balance of power in crypto may depend less on who issues the most tokens and more on whose token the market chooses to use.
Frequently Asked Questions
What is the main difference between USDT and USDC right now?
USDT remains larger by supply and reserves, while USDC is showing stronger transaction velocity and, in several recent datasets, stronger adjusted transfer volume.
Why does transfer volume matter more than market cap in some cases?
Transfer volume helps show how actively a stablecoin is being used for payments, settlement, and on-chain finance, rather than simply being held in wallets or on exchanges.
Is USDC now bigger than Tether?
No. Tether is still the largest stablecoin by circulating supply and reserve scale. USDC’s gains are mainly in usage metrics such as transfer volume and velocity.
Why are institutions paying more attention to USDC?
Circle emphasizes reserve transparency and holds USDC backing in cash and short-dated U.S. government instruments, which can be more attractive to regulated financial firms. Visa has also expanded USDC-based settlement for U.S. institutions.
Does Tether still matter if USDC moves more money on-chain?
Yes. Tether remains central to exchange liquidity, global crypto trading, and offshore markets. Its reserve size and market reach still make it one of the most influential players in digital assets.
Could both stablecoins keep growing at the same time?
Yes. Current evidence suggests the market is segmenting by use case, with USDT strong in trading liquidity and USDC gaining in institutional settlement and regulated financial applications.
