Seeing big companies buying billions+ dollars of bitcoin, isn't it becoming too centralized. Could they centralize it if they own a lot of it's portion.
How can we defend against this process?
Because institutions are investing in bitcoin does not make it centralized or to be in future, e ery investors are not going to be whales or crayfish holders, all we may have to consider is the network, which is decentralized ans the way bitcoin has been of an important asset of investment that yields more over time, they can't regulate it, everything here lies on the p2p network and the blockchain which all forbids censorship.
That's why they push for the adoption mainly through ETFs / big services offering BTC => fiat + the fees stuff, and so on: they want BTC, and they want to profit from it, not to give the people what they really want: something that enables themselves.