From 2011 - 2017 before any of the halving events China was the largest miner of bitcoins. Their dirt cheap electricity and access to GPU manufacturing facilities put them in this position and they took full advantage of it.

This is one of the main reasons that mining pools were created. Without a pool, even with a basement full of antminers, no one could compete with the warehouses in China.

People who do not know the history of btc are at risk to get the rug pulled from under them.

The largest holder of BTC is the CCP. The US gov also holds millions of coins from their raid and seizure of the silk road.