The evidence provided by multiple high-authority sources strongly supports the claim. The most direct evidence comes from a CryptoRank report which explicitly states that 'BTC, ETH in Billions Moved Off Exchanges,' citing data from the reputable on-chain analytics firm Glassnode. The claim of 291,000 ETH being withdrawn is highly consistent with this report; at typical market prices (e.g., ~$3,500/ETH), this amount equates to over $1 billion, fitting the description of 'billions'.This central piece of evidence is further corroborated by two separate reports from another authoritative source, CryptoQuant. These reports confirm the general trend, noting that 'Global Exchange Balances Drop' and that 'users are moving assets off exchanges overall.'While none of the provided source summaries state the exact figure of '291,000 ETH', the combined evidence from these credible sources confirms a massive net outflow of ETH from centralized exchanges within the relevant timeframe and on a scale consistent with the claim. There is no conflicting evidence among the relevant sources. The high authority of the sources (CryptoQuant, Glassnode) and the consistency of their findings lead to a high confidence assessment that the statement is likely true.