There has been a lot of talk of "price wars" between Chinese miners and the rest of the world, with Chinese miners preferring lower prices because it gives them an edge over newer Western miners in profitability. The higher the price goes, the more Western miners will continue coming online.
Haven't heard of this one, so there's really a competition behind this miners from behind and Chinese miners wanted to remain dominant, specially that there are a lot of news recently about some big companies getting in the mining picture and this is a threat to Chinese miners.
Yep, this is one article that touches on it:
Denis Rusinovich, who operates an 80-megawatt mining operation in Kazakhstan, expects that, once many more new generation ASICs come on line, this “will [have a] major impact [on] hashrate redistribution for the next 12 months.” He elaborated that, if the Bitcoin price is high after the halving (around or above $8,000), then inefficient miners will have a reprieve, but if Bitcoin is trending towards $4,000, then he expects we could see “price wars” wherein larger farms come out on top over smaller ones, something that could risk centralizing mining in China further.
Even with Bitcoin at $9,000, it’s likely that this halving will hurt North America “pretty bad in the near-term,” Vera told Decrypt, “but it will be good in the mid-term.”
https://decrypt.co/27777/bitcoin-halving-could-bring-way-more-mining-back-to-north-americaOne of the big issues is scale and capitalization. Retail miners in the West are easily squeezed by price volatility.
The northern US and Canada are well positioned for large scale Bitcoin mining operations due to cheap electricity and very cold, long winters. Miners can sell excess generated heat at scale to reduce costs. By co-locating operations adjacent to power plants and either generating power themselves or load balancing, mining in North America can absolutely compete with China. All that is needed is the proper infrastructural investment, and the proper capitalization and/or mining insurance to ride out price volatility. This will all take years to happen as Bitcoin mining gradually becomes viewed as more than just a super high risk venture, but I'm confident 10-20 years from now the global hash rate distribution will look very, very different.