do you realized that 10% of miners control 90% of the total mining, and that, of all the bitcoin owners, about 10000 of them control more than 1/3 of all the crypto market? You might think that you are big shot with your rigs and your few btc, but you are merely surfing a market controlled by a few business who dont care about you, your money and the crypto market. They only care about making more money. And, since that money has no legal tender and is volatile, their only option in the end, is to cash in to profit.
You are being very naïve thinking that "because it's decentralized", the very rich wont have control...
Easiest proof: Elon Musk can crash or raise a crypto value with few tweets.
And there are lot of other ways to manipulate that market, and when big money is at stake, some people have incredible imagination.