The whale manipulates its value and is so easily manipulated. Is this decentralization?
Decentralization has nothing to do with the market price.Read more about BTC,instead of asking newbie questions that were asked a million times.
Decentralization is about who can control the blockchain and decide which transactions to be confirmed.
Decentralization is also about controlling the amount of newly mined Bitcoins.
Gold price is manipulated,is gold "decentralized"?

Every market can be manipulated.