... Especially if that $500m requires 'clean bitcoins' from a known source of funds.
Sorry for off topic question, but what is meant by 'clean bitcoins'? Is this related to coins that can be traced back to a miner source (IP), or it is related to coins involved in some prior theft? {I searched and could not find a answer.} Thanks in advance.
New coins, ones that haven't been used in previous transactions.