Bitcoin is not decentralized anymore. There are few people manipulating the market which isn't good for small investors. If things are continue to go like this then soon it will be a currency of rich people only and it will affect small investors very badly. Stop selling your coins no matter what.
Irrespective the challenges that's always face cryptocurrency through government and the one that comes from Elon musk, cryptocurrency is still decentralized currency, people selling their bitcoin due to a tweet of Elon does not indicate or grant us to say that bitcoin centralized, we are not even hundred (100%) sure that while people sell their crypto is because of elon tweet, so in this aspect we have to different decentralized and centralized via Bitcoin, no controls cryptocurrency which made it to decentralized while centralized is controlled by a sector. So in summary bitcoin is still decentralized currency.