According to a report from Hashrate Index, the collective debt of Bitcoin mining companies will exceed $4 billion by the end of 2022. Core Scientific has the most debt, owing creditors $1.3 billion as of September 30, and has filed for Chapter 11 bankruptcy protection; Marathon Digital owes about $851 million, but most of it is convertible notes; the third debtor is Greenidge Generation, which owes $218 million, but is undergoing a restructuring process that may significantly reduce its debt. (Source link)