USDC Dominates Crypto Card Spending as Total Top-Ups Surge to $13.8 Billion

Stablecoin Card Top-Ups Hit $13.8B; USDC Leads, USDT Closes Gap

The figure marks a structural shift: stablecoin balances are migrating from exchange settlement and remittance rails into consumer-facing payment flows.

The issuer split cuts against the wider market. USDC currently leads tracked card spending, while USDT is gaining share. That ordering inverts the outstanding-supply ranking, where USDT remains dominant. USDC's card position aligns with its fintech and payment-infrastructure footprint, making it the default funding asset for most card programs. USDT remains anchored to exchanges, remittance corridors, and emerging-market flows, and now routes those balances into retail commerce through card products.

Chain distribution is broad. Base leads with approximately $1.2 billion in tracked stablecoin spending, followed by Solana at $635 million, Polygon at $544 million, and Optimism at $509 million. Arbitrum, Scroll, Ethereum, and Stellar register meaningful but smaller volumes.

Plumbing, Not Bypass

Most crypto cards do not route around the legacy payments stack. Issuers remain dependent on regulated processors, identity checks, and the Visa and Mastercard networks to reach merchants. The structural innovation sits in the funding and conversion layer: moving a stablecoin balance into a card transaction with minimal FX friction and acceptable settlement latency.

Competitive variables are narrowing accordingly. Custody design, FX cost, rewards economics, and capital efficiency now determine product viability. Several programs permit users to borrow stablecoins against crypto collateral rather than liquidate positions, effectively layering a credit instrument on top of a payment rail.

Circle has renewed its USDC distribution arrangement with Coinbase on existing terms, preserving a primary off-ramp for the asset. The shift in exchange-side incentives — toward stablecoin rewards as trading volumes compress — runs in parallel and reinforces the same liquidity-migration pattern.

Systemic Read

If card-funded stablecoin spend compounds without sustained rewards subsidies, the data set validates a narrow thesis: stablecoins can operate as consumer money while merchants continue clearing on legacy infrastructure. Peg mechanics, attestation cadence, and the liquidity delta across USDC and USDT will determine whether issuer balance sheets absorb that velocity without dislocation.

Two items to track: the share trajectory between USDC and USDT in card top-ups, and any renegotiation of Circle–Coinbase economics if USDC card volumes scale further.