According to @gdb, OpenAI introduced a native ChatGPT email-writing integration featuring writing blocks, in-chat formatting, highlight-to-request changes with accept or reject suggestions, and an option to open the draft in the user’s email client when ready, source: Greg Brockman on X, Dec 20, 2025; James Zhang on X (demo video), Dec 20, 2025. For equities, Microsoft has a multi-year partnership and investment with OpenAI and integrates OpenAI models across Microsoft 365 including Outlook, making MSFT a primary public proxy for adoption updates like this, source: Microsoft official blog (Jan 23, 2023) and Microsoft 365 Copilot announcements (2023). For crypto, the announcement contains no mentions of blockchain, wallets, or tokens, indicating no direct on-chain impact; any effect would be sentiment-driven toward the AI narrative rather than protocol changes based on this disclosure, source: Greg Brockman on X, Dec 20, 2025; James Zhang on X, Dec 20, 2025.