100 BTC challenge to Claude puts AI crypto fears up against Bitcoin’s real security limits
A public challenge from BitGo CEO Mike Belshe has become a flashpoint in the debate over whether artificial intelligence can actually break the cryptographic foundations behind Bitcoin. On Aug. 1, Belshe transferred 100 BTC, worth about $6.5 million at early-August prices, into a BitGo wallet address and openly challenged Anthropic to take it, after a wave of discussion around Claude’s security research and the Coldcard weak-randomness incident. When GoPlusZH checked the chain while writing, the funds were still sitting untouched. The article argues that AI is changing cybersecurity fast, but mostly by improving vulnerability discovery, exploit development, and analysis of weaker or insufficiently reviewed designs. It points to Anthropic’s incident report on Claude’s cybersecurity evaluations, as well as research showing progress against the post-quantum candidate HAWK and reduced-round AES. At the same time, it draws a sharp distinction between those results and the mature cryptographic stack used by Bitcoin, including SHA-256 and secp256k1. GoPlusZH’s main point is that real-world crypto losses rarely come from “breaking encryption” in the abstract. They usually come from implementation flaws, poor key management, phishing, social engineering, or supply-chain compromise. In that framing, AI looks less like a force that overturns mathematics and more like a powerful amplifier of existing operational and security weaknesses.







