@Cobrabitcoin again started controversial conversation on Twitter to change the protocol’s proof-of-work (PoW) to BTC community. Cobra target the Chinese firm Bitmain Technologies and CEO Jihan Wu. This is not the first time Cobra has initiated the subject of mining centralization as he has brought the topic up many times over the years about mining and hashing power of btc and bitmain.
(Source: https://news.bitcoin.com/the-anonymous-bitcoin-org-owner-accuses-btc-mining-pools-of-centralization)
BTC Hashing chart
(Source: https://twitter.com/CobraBitcoin)