The strongest evidence is the fetched Whale Alert Telegram channel page, which contains an entry with the exact amount and wording: “294,392,793 USDC ... transferred from unknown wallet to Coinbase.” That directly supports the claim. The X corroboration from @ItsBitcoinWorld repeats the same figure and attribution to Whale Alert, offering secondary support. Confidence is only medium, not high, because the exact Whale Alert transaction URL and the provided X links could not be fetched directly in this run, so I could not inspect the underlying transaction details or labels firsthand.