Stablecoins Choose Sides: USDT Runs the Checkout Lane While USDC Runs the Casino 🎰

The two largest stablecoins are settling into clearly separate lanes in the digital asset economy, with Tether's USDt (USDT) dominating onchain payments and Circle's USDC (USDC) anchoring decentralized finance activity, according to Dune's Digital Asset Brief. In the first half of 2026, USDT settled roughly $95 billion in identified commerce payments, compared with about $14 billion for USDC, and accounted for approximately 92% of the $48 billion in business-to-business payment volume tracked during the period.

USDT's heaviest footprint remains on Tron, where about 93% of the token's supply is held in ordinary wallets rather than on exchanges, a pattern consistent with its use as a remittance and settlement asset. The token's overall supply is split almost evenly between Tron and Ethereum. USDC, by contrast, has positioned itself as the stablecoin of choice for trading and DeFi. On Coinbase's Base network, USDC processed roughly $2.6 trillion in transfer volume in June, the highest figure recorded for any token-chain pair, while USDC on Ethereum handled an additional $1.6 trillion. On Base alone, USDC recorded daily velocity of about 20 times its circulating supply in June, a measure of how frequently the token changes hands.

Dune's analysis, which tracked more than 200 stablecoin tokens across multiple blockchains, found that USDT and USDC together account for about 83% of the sector's approximately $315 billion market capitalization. Despite USDC's expansion to newer chains, its supply remains heavily concentrated on Ethereum, while USDT continues to draw volume from a broader mix of networks.

The report frames the long-running USDT-versus-USDC framing as increasingly outdated, arguing that the two assets are diverging into distinct product categories rather than competing for the same use case. USDT's profile resembles a payment and remittance rail, while USDC functions primarily as trading and DeFi liquidity infrastructure.

The findings arrive as US lawmakers reshape the regulatory backdrop for stablecoin issuers. The GENIUS Act, signed into law in 2025, established the first federal framework for payment stablecoins, clearing a path for banks and other firms to issue US dollar-pegged digital assets. Lawmakers are now weighing the CLARITY Act, which would define how crypto assets are divided between the US Securities and Exchange Commission and the US Commodity Futures Trading Commission. The bill cleared the Senate Banking Committee in May and could receive a full Senate vote before the August recess, though Galaxy recently placed the odds of passage before the break at 50% as the legislative calendar narrows.