No, I think that's wrong thinking. You should never say that bitcoin is no longer decentralized just because someone manipulated its price in the market. Keep in mind that the bitcoin market is still in the process of growing and developing over time. They can toy with the price because it is quite financial while it doesn't change the decentralized nature of bitcoin. What the OP meant was that bitcoin users' thought and reaction became centralized because of the whale and FUD..

The difference between experienced investor and inexperienced investor (newbie investor) is how they survive FUD and whale game. It is clear that experienced investor will choose to stick with all the bitcoin they own because in reality the price continues to grow and reach new milestone over time.