Can a 51% Attack Be Used to Manipulate a Coin’s Price on an Exchange?

Indirectly, yes. A successful 51% attack leads to network instability, transaction reversals, and a loss of trust.

This immediately causes panic selling and a sharp drop in the coin's price. The attacker can profit by shorting the coin before launching the attack, then covering their short position after the price crashes.

The attack itself is not a direct price manipulation tool but a mechanism for creating the conditions for a price collapse.