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It is nice to see that other countries are starting to enter mining industry and by doing this, the dominance of China in mining will lessen. Bitcoin's mining difficulty will sure rise because of this, but dominance China to the mining industry and it's monopoly of bitcoin will be lessened. The only matter of concern though is if they are going to succeed in creating a 7nm chip or not but most probably they will succeed after all Japan is way more advanced in technology than any other country.
I was wondering about the viability of 7nm chips as well. If it would be so easy to produce working ASICs with 7nm chips, Bitmain and the other
ASIC manufacturers would already be doing this themselves!
The correction that DMM will invest 3 million $ in Bitcoin mining instead of the originally reported 300 million $ makes me even more sceptical.
I doubt that a 3 million $ investment is enough to seriously hurt Bitmain, because Bitmain is investing much more capital
into the development of ASICs and has more experience in both areas (BTC mining and ASIC manufacturing).