40% of all Bitcoins are owned by just 1000 individuals.
This gives them a disproportionate amount of control over the market as they are able to dump them at anytime.
This is not to mention the high proportion of bitcoins held by miners and exchanges, who may have perverse incentives to ensure that as many people buy up bitcoin as possible and hold it for long enough for the price to rise.
Is there any way to deal with the high degree of centralisation that Bitcoin has?
The advantage of being an early adopter buddy, they are in this position because they believe in the tech and develop a strong will to hold for long term. There is nothing you or anyone can do about it except to accept it. If the demand for btc keeps growing I don't see it as a threat, there will always be buyers ready to pick the btc up, it is only when there is no demand such should be of concern.
Right now with the amount of exposure btc has gained as a result of this war, the awareness has increased so as demand is increasing, whales are definitely aware of this and understand there are buyers ready to take it from them