The PoW process is especially used in cryptocurrencies like Bitcoin. This process keeps the blockchain secure. In the PoW process, the decision-making power of the blockchain is divided among many miners, so it is not under the control of a single party. It is a completely decentralized system. No one can control it alone. But PoS can maintain the advantages of fast transactions and energy efficiency. However, this method can sometimes create the risk of centralization because in this method, large stake holders get more control over the network.