What Is the Incentive for a Miner Not to Participate in a 51% Attack?

The main incentive for a miner not to participate in a 51% attack is that it would devalue the cryptocurrency they are mining. A successful 51% attack would erode trust in the network and cause the price of the cryptocurrency to crash.

This would make the miner's holdings and future mining rewards worthless. Additionally, the cost of launching a 51% attack is often greater than the potential profits, making it an economically irrational decision for most miners.