Frontier Models Eating All, SF's AI Dominance, Bitcoin Vegas Announcements

— Block unveiled an updated Bitkey hardware wallet with a touchscreen display to verify deposit and send addresses, reducing vulnerability to address-replacement attacks; multi-sig design with social recovery means users retain Bitcoin even if Block ceases operations.

— Square now supports NFC tap-to-pay triggering Cash App Bitcoin transactions; Cash App is offering 5% Bitcoin back on Square purchases and enabling Lightning or Bitcoin peer-to-peer payments; withdrawal limits have been raised significantly from historically restrictive levels.

— Block announced proof of reserves (but reportedly not proof of liabilities, unlike River's earlier implementation); River pioneered this verification mechanism with anonymous Merkle trees showing customer balances.

— Aven launched Bitcoin-backed lines of credit with physical Visa cards, offering 7–11% rates at 30–70% loan-to-value; Surge (self-custody via signer networks and MPC) and Lava (previously DLC-based) also compete in this space.

— Tether, 21 Corp (formerly CEP via SPAC), Strike, and Electron (large Bitcoin miner, ~5% of global hash) announced strategic combinations; Tether committed $2.1 billion to the 21 entity for Bitcoin-backed lending and financial services.

— Hack Nation AI global hackathon drew 5,000+ applicants across 12 physical hubs; Spiral sponsored a Lightning Network "earn in agent economy" challenge; 73 teams chose it, including some who switched from World Bank challenge to build with Bitcoin/Lightning.

— Diversify custody: consider Bitkey for user-friendly self-custody with multi-sig recovery, or maintain separate savings (self-custody) and spending (Lightning) wallets depending on use case and risk tolerance.

— Evaluate Bitcoin-backed liquidity products on loan-to-value, liquidation mechanics, rates, and custody model (pooled vs. isolated addresses); no-liquidation home equity products offer stability but remain in early stages at Coinbase.

— Engage non-Bitcoin audiences at broader hackathons and AI events rather than only Bitcoin conferences; demonstrate practical utility rather than ideology to build mainstream adoption.