Monthly spending on digital-asset payment cards reached $759 million in July 2026, underscoring how a once-niche crypto product is gaining scale in everyday payments even as it remains small beside traditional card rails. a16z Crypto said card transactions totaled about 8.8 million in July, up about 69% from roughly 5.2 million a year earlier, with an average payment of about $86. Dollar-backed stablecoins USDC and USDT accounted for 84% of card spending by July, while euro-backed EURe fell to 2% after holding 88% in early 2024, and payment activity spread from Gnosis toward Optimism, Solana and Base. Visa processed about 99% of tracked monthly payment volume, while Paymentscan.xyz data showed Mastercard's share briefly rose to around 5% earlier this year before falling back to about 1% by late July. The cards typically route stablecoin spending through existing card networks by converting digital assets into local currency for merchants, and a16z said use of those rails is expanding as stablecoin adoption grows.