Saturday's Weekend Brief is out: The Deadline, the Wrappers and the Buyback. One chart from it shows Metaplanet and Twenty One stock carried the most Bitcoin per $100 at Friday's close. The full issue also covers Brazil's Oct 30 license deadline for Bitcoin exchanges and Wall Street's latest Bitcoin moves from BlackRock, Grayscale and Fidelity. Subscribe for every issue: nitter.siddz.com/LuxWire/creator-subscr…

Fifteen Bitcoin mining companies, including Bitmain, MicroBT, Canaan, Foundry, F2Pool and Bitdeer, have committed to build integrations for Tether's open source Mining Development Kit. The goal is one shared layer so apps and AI agents can run mining machines from different vendors. These are commitments, not shipped integrations. Version 0.11 is out now, and Tether is targeting a stable 1.0 by the end of 2026. For Bitcoin, an open control layer that the biggest hardware makers sign onto would most likely make mixed fleets cheaper to run and weaken any single vendor's grip on the software.

Electrum users on any version older than 4.8.3 should update now. Developers say some malicious Electrum servers are already exploiting a wallet flaw in the wild. The server hides your real payment and shows a fake one, and if you fee bump that fake, your wallet signs a real payment to the attacker. One user has reported losing funds so far. For Bitcoin holders, the fix is simple. Update, or connect only to a server you run or trust, and check the full address and amount on every signature, fee bumps included.

Bitcoin Fact #20: Bitcoin's Taproot upgrade went live on November 14, 2021, at block 709,632, the first major change to Bitcoin's rules since SegWit in 2017. Miners locked it in that June under a process called Speedy Trial, which needed 90% of the blocks in a single 2,016 block difficulty period to signal support. #BitcoinFactOfTheDay

South Korea's presidential office is leaning toward delaying the 22% crypto gains tax on profits above 2.5 million won ($1,900) a fourth time, most likely to 2029. The law still sets a Jan 1, 2027 start until Parliament amends it in November.

Every bank said that right before the line outside the door.

France's biggest mobile network went down nationwide for nearly 10 hours, and the next day the No. 1 social app in the French App Store was one that doesn't need a network at all. Jack Dorsey's Bitchat passed Telegram and Signal after Orange's nationwide outage, Frandroid and iGeneration reported. Frandroid tied the surge to the outage and to protesters who fear social media gets cut at the next march. Both come down to reaching people when the usual service is gone. Bitchat hops messages phone to phone over Bluetooth, with no internet, no phone number and no account. Money has the same weak point. A card or bank app that needs a working tower fails the same afternoon the texts do. A Bitcoin transaction can be signed offline and broadcast later, once a connection is back.

Says the people whose currency keeps melting.

A Bitcoin payment gets harder to reverse with every block that lands on top of it. Satoshi's whitepaper puts a miner with 10% of the network's power at about 1 in 5 after one block and about 1 in 4,100 after 6. That steep drop is why wallets wait for confirmations before they call a payment final.

Inflation is handled, they said.

Cheat sheet.

Stock and bond markets closed Friday afternoon. Bitcoin kept trading, and it will keep trading straight through to Monday morning. That makes Bitcoin the first market to price anything that breaks over a weekend. Fewer traders are around and order books run thinner, so a Saturday headline can move it further than the same news would on a Tuesday. I treat a weekend move as the first read on the news. Monday, when everything else reopens, decides whether it holds.

Just save every dollar for a few centuries.

Fighting inflation by politely watching it.

100x long was definitely a retirement plan.

BTC is surging over $80k this afternoon!

Bitcoin Fact #19: On May 22, 2010, programmer Laszlo Hanyecz paid 10,000 Bitcoin for two Papa John's pizzas, the first widely known purchase of a real world good with Bitcoin. Another forum user ordered the pizzas for him and took the coins in return, and the community now marks the date every year as Bitcoin Pizza Day. #BitcoinFactOfTheDay