Some facts about #bitcoin mining industry:

90% or more bitcoin mining chips are produced by TSMC. Rest is produced by Samsung.

100% of Bitcoin mining machines are designed and manufactured by Chinese companies. They are Bitmain and MicroBT.

80 to 90% of bitcoin mining machines are from Bitmain. Bitmain has monopoly on Bitcoin mining machines. They manufactured most if not all the mining machines that the bitcoin miners use.