How Does the Cost of a 51% Attack Relate to a Coin’s Total Network Hashrate?

The cost of a 51% attack is directly proportional to the coin's total network hashrate. A higher total hashrate means an attacker must rent or acquire more computing power to reach the 51% threshold, driving up the rental cost.

For smaller coins with low hashrates, the attack cost is minimal, making them attractive targets. The cost is often calculated as the hourly rental price of the required hashpower to exceed 50% of the network.