In Berlín, El Salvador, a person can spend an entire day using only Bitcoin — coffee, food, transport, groceries, phone bills — and that has been true for three years. This week, Block made Bitcoin default inside its merchant and consumer stack, a university in the Democratic Republic of Congo sold chickens for sats, and a village in Zambia showed what a circular Bitcoin economy looks like when it grows organically. Meanwhile, South African merchants keep adding Bitcoin checkout, Lightning Enable demonstrated the first AI agent purchasing a real product over Lightning, and Cashu wallets moved closer to tap-to-pay at physical terminals.
Berlín, El Salvador — three years of full-day Bitcoin spending: A community-led build that started as an idea is now a city-scale payment zone where residents spend Bitcoin on coffee, food, transport, groceries, and phone bills — every day, for three years running. No pilot program, no corporate sponsor. Just a community that decided to build it.
Spotlight: Block Expands Bitcoin Across Its Merchant and Consumer Stack
Block is turning Bitcoin into a default inside its product ecosystem, not an opt-in experiment. This week, the company laid out a stack that spans merchant checkout to consumer savings to self-custody — all connected through Lightning.
Square merchants now offer 5% BTC back to customers paying with Cash App. Cash App added automatic conversion of peer-to-peer payments into bitcoin. Bitkey provides self-custody with proof-of-reserves verification. And Block confirmed that NFC tap-to-pay and a bitcoin toggle are coming to Square terminals. Owen Jennings, who leads Bitcoin at Block, framed it plainly: "Bitcoin only works if people use it."
The significance is structural. Block is not adding Bitcoin as a feature — it is embedding Bitcoin into the flows that millions of merchants and consumers already use. The 5% BTC back incentive at Square merchants creates a spend loop: customers earn bitcoin by paying at merchants who already accept it, and the on-ramp is the checkout they were going to use anyway.
1) Merchant & Enterprise Adoption
New merchant onboarding continued across South Africa, Mozambique, and Paraguay — through processors, community organizers, and first-use activation events.
- South Africa — Bitcoin Friendly SA launches as merchant acceptance widens: Nick Darlington (@NickDarlington) listed cafés, restaurants, and coffee shops already accepting Bitcoin — including Bootlegger Coffee Company, Spur, Mugg & Bean, Rosie's Steak Bar, and Delfinos Seaside Restaurant — and announced Bitcoin Friendly SA to grow Bitcoin payments and local circular economies. Separately, TLW South Africa added Bitcoin checkout for lighting products through PeachPayments and MoneyBadger (@MoneyBadgerPay), Comfyzak (beanbags) went live via PeachPayments, Woodka Interiors (furniture, décor, lighting) added Bitcoin via PeachPayments, and Ekhaya Coffee in Strand Beach accepts Bitcoin for in-person meals and online orders. One market, multiple verticals, same payment rails.
- Mozambique — La Casa Moz adds Lightning across three service lines: A guesthouse, restaurant, and coffee-and-juice bar in Maputo now accept Lightning payments through a single Blink address (lacasamoz@blink.sv). Bitcoin Famba (@BitcoinFamba) is building hospitality acceptance in a market that had almost none.
- Paraguay — Mercadito Lightning pairs merchant discovery with first-use onboarding: An Asunción meetup organized by BTC Paraguay (@BTCParaguay) featured local entrepreneurs accepting Bitcoin. A beginner workshop had participants bring ₲50,000 cash to exchange for Bitcoin and make their first real transaction. Merchant activation and user activation in the same event.
2) Payment Infrastructure
Infrastructure progress this week ranged from tap-to-pay hardware to self-custody breakthroughs, agent-native payment rails, and one of the longest-running community BTCPay instances migrating to a new home.
- Cashu NFC tap-to-pay moves toward physical terminals: Cashu wallets are being readied for NFC checkout. The flow is ecash-native: a wallet reads a payment request from the terminal, selects ecash, and sends it back over NFC — the payer does not need an internet connection. @macadamiacash demonstrated paying a terminal over NFC, fully interoperable with Cashu wallets. Calle (@callebtc) described it as the first step toward offline-capable Bitcoin payments at point-of-sale.
- Lightning Enable — AI agent buys a real product over Lightning: An AI agent purchased a product from Great Ghee using Bitcoin over Lightning in approximately 30 seconds. Lightning Enable (@lightningenable) described this as a repeatable merchant integration, not a one-off demo. The same team's L402 store logged 925 checkout attempts in 80 days with roughly 12 human conversions and no active marketing — discoverable by MCP-equipped agents via an L402 registry. Their HTTP 402 API framework lets existing APIs accept Lightning payments without code rewrites: "Payment is the credential."
- ZEUS v13.0.0 ships with a ground-up wallet rebuild: ZEUS (@ZeusLN) released v13 with a graduated wallet experience, an LDK Node-powered engine, device migration with channels intact, and a complete Cashu rewrite. The release marks a shift to a production-grade mobile wallet with self-custody defaults.
- Enclave-based Cashu mints — non-custodial by design: A new architecture generates private keys inside a secure enclave that the operator cannot access. The result: the mint operator cannot steal bitcoin or issue more ecash than BTC received. Calle framed the regulatory implication: "You can't access the bitcoin, so you're not a custodian."
- LN-stablecoin bridges go live: Garden.fi and Flashnet launched the first Lightning-to-stablecoin bridges. Miles Suter (@milessuter) described a pattern already emerging: a business only accepts bitcoin, but increasingly sees users pay through lightning-enabled bridges funded by other assets. The payment rail is Lightning; the funding source is whatever the payer holds.
- Aruba — community BTCPay instance migrates after 5+ years: Bitcoin Aruba (@BitcoinAruba) is migrating from btcpay.btc.aw to pay.btc.aw — one of the longest-running community-operated BTCPay Server instances. Merchants need to recreate stores, wallets, and integrations on the new server. Five years of uptime on community infrastructure is its own proof of concept.
- BitLocal v3.0 launches on iOS: A FOSS app for finding real-world places to spend bitcoin, with alerts for new local merchants. BTC Map (@btcmap) called it a strong addition to the merchant discovery stack.
3) Circular Economy & Ground-Level Proofs
The week's deepest spending evidence came from communities building complete Bitcoin payment loops — production, payroll, savings, and daily commerce — in Kenya, the DRC, Zambia, and across a growing number of grassroots merchant clusters.
- Kenya — Bitcoin Chama scales a full circular economy in Kiamokama ward: In Kisii County, Bitcoin Chama (@Bitcoinchama) runs an economy where all products are sold in Bitcoin, all savings are held in Bitcoin, and 8 team members earn salaries in Bitcoin. The community has funded 25 beehives, vegetable plots leased to 25 women, a youth chicken coop, goat projects, and a cultural band — all denominated in sats. More than 230 people have been taught about Bitcoin. The expansion target is 25,000 families — roughly 100,000 people — across the ward. And one member is now running for the MCA seat in Kiamokama ward, accepting campaign contributions through Geyser.fund in sats.
- DRC — University of Goma becomes the first African college to accept Bitcoin: Documenting Bitcoin (@DocumentingBTC) reported that students at the University of Goma bought 25 chickens from the university's agro-pastoral farm using Bitcoin wallets. This is institutional acceptance paired with a real unit sale — not a donation or a pilot, but students buying agricultural products from their own university with sats.
- Zambia — Mud Hut Village runs on Bitcoin: Joe Nakamoto (@JoeNakamoto) described a village where Bitcoin payments cover water, restaurant meals at Mundayami Restaurant, and local merchant purchases — all linked through Blink addresses and BTC Map. Bitcoin Vic Falls (@BitcoinVicFalls) said the circular economy was "built in a natural, organic way." Three or more BTC Map-linked acceptance points operate in a single cluster.
- Mozambique — fedimint ecash and Lightning side by side in Maputo: A Bitcoin Famba (@BitcoinFamba) meetup drew roughly 47 people. The session demonstrated fedibtc — an app for circulating sats via private chat and Lightning — alongside interoperability between fedibtc and Conduit. Separately, CRISP, a community-run internet and WiFi service, is paid in sats.
- South Africa — education rewards feeding into spending: Bitcoin Ekasi (@BitcoinEkasi) reported that 9 students earned 18,000 sats for consistent participation over four days. Those reward sats are then spent at Ekasi Caterers and local shops — closing the loop between learning and commerce.
- Cross-market grassroots spend: Cape Town's Bootlegger meetup had attendees pay their bill plus a 10% tip in Bitcoin. In Bolivia, two Bitcoin-accepting businesses — chemsitos and kerikitokafe — announced their first merchant-to-merchant collaboration. Rural Kenya logged repeat purchases of rice, soap, tealeaves, and jelly at the same Lightning-enabled endpoints. Ghana and Nigeria added new BTC Map merchants in Akatsi and Ekiti State. The category list keeps expanding: hair salons, body lotion, porridge flour, printing services, thrift shops, water refills.
From a three-year-old circular economy in El Salvador to a university chicken sale in the DRC to a village in Zambia where Bitcoin just works — the evidence keeps compounding. Block is making Bitcoin default inside the tools millions already use. Communities are building the rest themselves.
And the next generation is already learning. In Guatemala, kids at Bitcoin Lake are practicing with Lightning. In Zambia, students at Bitcoin Vic Falls are doing the same. The tools are the same. The rails are the same. The age keeps dropping.
See you next week.
