Identifying decentralization in PoS and PoW blockchains

Cryptocurrencies are advertised as being decentralized but what does it really mean? Moreover, which type of blockchain is more “decentralized” so to speak? The term is used to refer to systems that are not managed by a central authority but rather controlled by the users (therefore the name). In the crypto market, Proof of stake (PoS) and Proof of Work (PoW) protocols are used to keep them decentralized. These protocols give authority to the users that participate by conducting processes on the network. So what influence do major participants hold on these networks? Bitcoin and Ethereum among many others host