An unknown wallet transferred 1,840 Bitcoin worth about $152.8 million directly to a Coinbase Institutional deposit address, marking a substantial inflow to the platform's institutional custody infrastructure. On-chain data identified the sender only as an unidentified address. The movement follows a 1,700 BTC outflow worth $142 million from Coinbase Institutional to an untagged wallet, alongside other large transfers in both directions. Large deposits with exchange custodians are monitored as possible evidence of institutional positioning, custody rebalancing or liquidity movements, although the transaction alone does not establish its purpose.