Why Is a 51% Attack More Likely in a Low-Liquidity PoS Coin?

A 51% attack is more likely in a low-liquidity PoS coin because the cost to acquire 51% of the total staked supply is lower. Low liquidity means a smaller market capitalization and less capital is needed to buy the necessary majority of tokens.

Furthermore, the act of buying a large amount of the coin in a low-liquidity market would cause extreme price slippage, making the attack more costly but still potentially feasible.