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US Bitcoin Payments Are Getting Real: Retail Rails Could Push $2M a Day On-Chain

Retail payment apps and merchant rails are poised to turn routine checkout flows into meaningful crypto demand if platforms enable external transfers: Walmart’s OnePay, via a Zero Hash integration, can support trading, custody and on‑chain deposits/withdrawals, and if toggled on could route a portion of daily purchases onto public networks. Using simple funnel math, a OnePay ecosystem with 10 million eligible actives, 50% enabled, 1% monthly buyers and $150 tickets would imply roughly $1.7–$2.5 million a day of Bitcoin purchases, with larger scenarios reaching $5–10 million. Merchants already have functioning rails—Lightning for Bitcoin, layer‑2s and stablecoins for Ethereum/USDC—reducing fees and settlement friction and shifting the operational debate toward refunds, reconciliations and custody models. The business stakes: enabling external transfers would increase visible on‑chain activity and retail‑sourced liquidity that, while small versus ETF flows, is persistent, affects merchant economics, and shapes which crypto rails gain mainstream adoption.