Almost 53% Of The Bitcoin Hash Is Controlled By Two Chinese Companies
From the information provided by BTC.com, we can see that more than 52% of the entire hashrate of the Bitcoin network belongs to three Chinese mining pools.
The most computing power falls on only three pools:
F2Pool — 21,8%;
AntPool — 16%;
BTC.com — 15,1%.
Note that AntPool and BTC.com are owned by the world's largest network equipment manufacturer Bitmain, which controls 31.1% of the entire Bitcoin network. In other words, only two Chinese companies own 52.9% of the network’s capacity.
This endangers the key feature of Bitcoin - decentralization - if the two companies join forces, they can easily make attack 51%.
Recall, after halving, the income of miners decreased by 44%, the hash value decreased by 16%, and the mining complexity decreased by 6%.