Wow, look at that chart 17.9% f2pool!
That chinese miner guy can collapse bitcoin anytime.
If you are using bitocin, you are under the generosity of super elite of CCP.
That f2pool {w,sh} ould do whatever super elite of CCP says.
Satoshi knew if mining centralized, bitocin would die. So he fought to last for survival of bitcoin. He even suggested gentlemen's agreement to distribute hashing power at desperation. After serious centralization he knew it is failed, so just disappeared.