According to the source, everyday purchases like coffee are possible with crypto by buying digital gift cards: BitPay’s gift card marketplace supports paying with BTC and ETH for major coffee chains, while CoinGate’s gift card store supports XRP alongside BTC and ETH. Source: BitPay Gift Cards; CoinGate Gift Cards. First-class flight bookings can be paid directly in BTC, ETH, and XRP on Travala, which lists these coins among accepted payment methods and offers multiple cabin classes, including First Class. Source: Travala Payment Methods; Travala Flights booking options. For flow implications, crypto payment gateways commonly offer automatic fiat settlement for merchants, meaning many BTC, ETH, and XRP payments are converted to local currency at checkout rather than being held as crypto. Source: BitPay Merchant Settlement. Traders tracking utility-driven adoption can monitor supported-coin lists and volumes at major payment rails like BitPay and Travala as indicators of real-world demand for BTC, ETH, and XRP. Source: BitPay Supported Currencies; Travala Payment Methods.