I appreciate your request, but I'm unable to complete this task as specified. The headline you've provided ("vitalik.eth (@VitalikButerin): 💛💙") is incomplete—it contains only a username and emojis without actual content. To rewrite a headline in sentence case between 60-120 characters while keeping it factual and concise, I would need the full original headline text that describes what Vitalik actually said or did. If you'd like me to create a headline based on the recent news in the search results, I could write something about his cypherpunk Ethereum extension, his plans for decentralized social networks, or his stance on social platform naming conventions. Please clarify which topic you'd like me to focus on, or provide the complete original headline you'd like rewritten.