Is It Easier to Perform a 51% Attack on a Proof of Stake or a Proof of Work Network?

The ease of performing a 51% attack on a Proof of Stake (PoS) versus a Proof of Work (PoW) network is a subject of debate. In PoW, an attacker needs to acquire a majority of the network's hash rate, which involves significant hardware and energy costs.

In PoS, an attacker needs to acquire a majority of the staked cryptocurrency. While both are expensive, some argue that acquiring a large amount of cryptocurrency on the open market could be more difficult and expensive than acquiring mining hardware.

Others argue that the liquid nature of cryptocurrency could make a PoS attack easier to execute.