A 51% attack would cost much more on Ethereum than on Bitcoin

In a recent interview, Ethereum researcher Justin Drake pointed out that a 51% attack on Bitcoin would be much less costly than on Ethereum. According to his estimates, compromising the Bitcoin network would require approximately $10 billion, while attacking Ethereum would require acquiring more than half of the staked ETH—a current value of approximately $44.8 billion.

Furthermore, an attempt to massively purchase ETH to take control of the network could lead to a price spike, making the operation even more expensive. This difference is largely explained by the distinct consensus mechanisms of the two blockchains: Proof of Work (PoW) for Bitcoin and Proof of Stake (PoS) for Ethereum.