In 2019, China contributed more than 75% of the BTC network hash rate and by July 2021, the number dropped to 60%.In 2019, China contributed more than 75% of the BTC network hash rate and by July 2021, the number dropped to 60%.  Read More crypto miningIn 2019, China contributed more than 75% of the BTC network hash rate and by July 2021, the number dropped to 60%.