匿名ウォレット間で2億6100万ドル超のUSDCが送金

The assessment is primarily based on the high authority and relevance of the primary source, Whale Alert. This service is designed specifically to detect and report large cryptocurrency transactions on public blockchains, which is the exact subject of the statement. The summary for Whale Alert explicitly mentions that it labels wallets as "unknown" when they are not associated with a known entity, directly corresponding to the claim's criteria.While the provided secondary sources from CryptoRank do not confirm this specific transaction between two unknown wallets, they do corroborate that USDC transfers of a similar or even larger magnitude (e.g., $309 million and $348 million) are common occurrences that are flagged by services like Whale Alert. This confirms that the scale of the transaction described in the statement is plausible and routine in the cryptocurrency market.The other sources are either not relevant (e.g., eBay, Stripe, Allett Wallets) or describe different types of transactions (minting or burning of coins), which do not directly support or contradict the statement about a wallet-to-wallet transfer.In conclusion, the existence of a highly credible primary source whose sole purpose is to report such events, combined with secondary sources confirming the normalcy of transactions of this size, makes the statement highly probable. The specificity of the amount suggests it refers to an actual event captured by a service like Whale Alert.