Another problem some raise is subsidiary, and an editorial committee, between miners for rewards, a of The Wall Street Journal, is being formed to support of de-facto centralization.
Both consensus mechanisms have economic consequences that penalize malicious actors.
For PoW, miners must invest in processing equipment and incur hefty energy charges to power the machines attempting to solve the computations. Proof of work provides a lot of benefits, especially for a simple but extremely valuable cryptocurrency like Bitcoin. Proof-of-work requires a significant amount of energy to verify transactions.
