The Polylog Crypto Intelligence Brief

Morning Edition · Sunday, August 2, 2026

Crypto

Coldcard Cold-Wallet Theft Nears $89 Million as a Five-Year-Old Firmware Bug Reproduces Users' Keys

Galaxy Research counts three rounds that drained about 1,367 bitcoin from 4,585 single-signature wallets, all traceable to seeds that a 2021 update generated with predictable software randomness.

3 sources
Corroborated

Crypto

Aztec Launches Alpha V5, an Ethereum Layer-2 That Proves Private Transactions on the User's Own Device

The network proves a fully private transaction in about 2.5 seconds on a laptop and cuts fees below five cents, but a critical vulnerability remains unpatched and audits are still running.

2 sources

Crypto

Strategy Holds STRC Dividend at 12 Percent After $8.2 Billion Loss and Its First Bitcoin Sale in Four Years

Michael Saylor's firm paused new bitcoin purchases, sold coins to fund preferred dividends, and is building a multibillion-dollar cash reserve to protect its funding structure.

3 sources

Crypto

SEC Reopens Nasdaq Bitcoin Options Approval as CME Argues the Contracts Belong to the CFTC

The challenge revives the unresolved question of whether bitcoin is a commodity or a security, and which regulator controls the fast-growing market for crypto derivatives.

2 sources
Corroborated

Crypto

Index Coop Issuance Contract Hit by a Time-of-Check Bug as DeFi Exploit Losses Keep Compounding

A newly documented reentrancy-style flaw in a token issuance flow joins a run of smaller protocol drains catalogued this week across lending, perpetuals, and cross-chain venues.

2 sources

Markets

Tokenized Stock Trading Jumped 288 Percent in July, but a Single Nasdaq-100 Token Drove Most of It

Without one QQQ token, monthly volume for tokenized equities would have fallen roughly 30 percent from June, which shows how concentrated the on-chain equities market still is.

1 source

Crypto

Miden Pitches 'Practical Privacy' With Guardian, a Recovery Layer for Confidential Accounts

The project argues that privacy will only reach mainstream and institutional use if confidential accounts can also be recovered and selectively disclosed, not just hidden.

2 sources

Crypto

Russia Bans Crypto Mining in Moscow Region Until 2032, Citing Power-Grid Strain

The prohibition removes one of the country's densest demand centers from bitcoin mining and reframes electricity, not regulation, as the binding constraint on the industry.

1 source
Corroborated

Crypto

Bank of Italy Study Finds Stablecoin Remittances Often No Cheaper Than Traditional Transfers

A mystery-shopping experiment found that exchange fees, foreign-exchange spreads, and banking systems erase the on-chain savings that stablecoins are marketed on.

1 source
Corroborated

Crypto

Bitcoin Mining Difficulty Falls 14 Percent From Its Yearly High as Weak Revenue Forces Operators Offline

Forward markets signal little relief through year-end, pushing miners to shut older machines or pivot capacity toward other computing work.

1 source

Crypto

Solana Foundation's New Security Chief Warns AI Is Making Crypto Scams Harder to Detect

Michael Coates says vulnerabilities generated with artificial intelligence and synthetic identities, not just smart-contract bugs, will drive the next phase of blockchain security threats.

1 source

Macro

US and Japan Mount Joint Yen Intervention as Bessent Notes Point to a $5–10 Billion Purchase

Photographed Treasury notes and official confirmation of ongoing intervention signal a coordinated defense of the yen, a rare use of state currency purchases.

1 source
Corroborated