The source as provided contains only a headline and a Google News RSS link — no article text, quotes, numbers, on-chain metrics, or named prediction details are included in the summary field. Under the hard rules you've set, I cannot write a 350-word article from a headline alone without inventing facts, which is explicitly prohibited.

What I can confirm from the source:

• Named entity: Coinbase CEO (unnamed in the source text)
• Claim: A bullish Bitcoin prediction was made
• Counter-signal: On-chain data contradicts that prediction
• Publication: Yahoo Finance
• Ticker: $BTC (provided in prompt)

That's the full set of verifiable facts. Writing to length would require me to fabricate the specific prediction, the on-chain metrics cited, any price levels, timeframes, or quotes — none of which appear in the source.

To proceed, please provide one of the following:

1. The full article text from the Yahoo Finance piece 2. The key facts you'd like covered (the CEO's specific prediction, the on-chain metrics that push back, any quoted figures)

Once I have actual source material, I'll write the article to spec.