Stablecoin Specialization: USDT Dominates Payments, USDC Leads DeFi

Recent data from Dune's Digital Asset Brief suggests that stablecoin competition is shifting towards specialization, with Tether's USDT and Circle's USDC fulfilling different roles in the crypto economy.

USDT appears to be dominating real-world-style payments, with approximately $95 billion in identified commerce payments in the first half of 2026, compared to around $14 billion for USDC. On Tron, about 93% of USDT's supply is held in ordinary wallets rather than exchanges, indicating its use as a payment and remittance asset.

In contrast, USDC seems more central to on-chain finance, with transfer volume on Base reaching roughly $2.6 trillion in June, and around $1.6 trillion on Ethereum. The token's velocity also suggests frequent movement of the same supply across trading, lending, or routing activities, patterns often associated with on-chain markets.

These findings argue that the traditional framing of USDT competing directly with USDC as the default stablecoin does not capture how stablecoins actually behave across chains and use cases. Instead, it's more useful to ask where each stablecoin fits in the on-chain stack, with USDT concentrating around payments and remittances, while USDC is more deeply embedded in transfer-heavy trading and DeFi ecosystems.

Regulatory momentum may change how stablecoins scale, with the US GENIUS Act creating a federal framework for payment stablecoins, and the CLARITY Act potentially reshaping broader market structure affecting issuers and platforms. The next question is how regulation will affect which stablecoin roles can scale most easily across payments, lending, and trading.