How does one monitor all bitcoin address that hold more than a certain amount and detect movement from cold storage? Is there a service or site where one can monitor all large bitcoin hodler addresses to detect movement? And as seen below with the mt.gox trustee moving coins from his cold storage. How does one find out when a mass exodus of cold storage movement happens?
There are sites that monitor the blockchain and aggregate the data. E.g. https://bitinfocharts.com/top-100-richest-bitcoin-addresses.html