In its first quarterly results since coming public late last year, Sydney-based Iris Energy (IREN) reported mining 364 bitcoin in the fiscal second quarter (ended Dec. 31), up 51% from three months earlier.Read MoreCoinDeskIn its first quarterly results since coming public late last year, Sydney-based Iris Energy (IREN) reported mining 364 bitcoin in the fiscal second quarter (ended Dec. 31), up 51% from three months earlier.