What is NFC? (Near Field Communication) ⚡️📱 NFC is a short-range wireless technology (usually <4cm) that enables instant, contactless data transfer between two devices. - Retail Speed: NFC replaces QR scanning with a "tap-to-pay" experience, making Bitcoin Lightning payments as fast as a traditional debit card. - Cold Storage (Tangem): Wallets like Tangem use NFC chips to store private keys securely offline. You sign transactions by tapping the card to your phone; the keys never leave the chip. - eCash & Cashu: Modern wallets use NFC for peer-to-peer @f2456c85…6a12efd9 transfers, allowing users to swap private eCash tokens by simply touching phones together. - Bolt Devices: This tech powers "passive" hardware like @df4806f4…0b2b6a2a, Bolt rings, and tags that don't need batteries—they draw power from the reader during the tap. The Lesson: NFC is the "Nuts and Bolts" of mainstream adoption. It turns complex cryptography into a simple, physical habit that everyone already knows how to use. 🧱🍊