Arkham data shows BlackRock ETF wallets moved 8,513 ETH (about $19.14 million) and 416.654 BTC (about $29.86 million) into Coinbase Prime.The flows came via the firm’s spot Ethereum ETF ETHA and Bitcoin ETF IBIT, underscoring how ETF vehicles now route institutional size through centralized prime brokerage.The transfers extend a months‑long pattern of BlackRock using Coinbase Prime for large ETF‑related reallocations as crypto markets react to shifting macro signals.