I believe that the involvement of major financial players like Blackrock in the cryptocurrency space could lead to increased legitimacy and attract new investments to the market. However, it could also pose a risk of centralization and the loss of the decentralized nature of cryptocurrencies. Nonetheless, it's positive to see such companies entering the cryptocurrency arena as it signifies another step towards its mainstream recognition.
It’s like you’re missing the whole point up mate, what kind of centralization can a big companies offer, no matter what they buy they can’t simply hold 50% of the entire bitcoin. Also bitcoin network is also not about the number of bitcoin you hold yes that’s only a topic to discuss if you say what if they decided to sell. It will simply mean a thing they will sell and if it is a very large amount they will market will react negatively to it after a short period of time and we get back to been Normal and you know the effect will affect just everyone too even them that have bitcoin holdings at hand but still for a short period.
As for bitcoin network decentralization nothing can centralize it because every node runner is part of the network and any move
Must be consensus which means that even if blackrock today holds like more than 51% power of the network they can’t of things still there own way until other node agrees. So the talk of a centralization is not happening except if they get the consensus always on their back which will never happen