Can a 51% Attack Be Used to Steal Other Users’ Cryptocurrency?

No, a 51% attack cannot be used to steal other users' cryptocurrency by creating transactions from their wallets. The attacker does not gain access to the private keys of other users.

The attack's power is limited to disrupting transaction confirmations, double-spending the attacker's own coins, and preventing other miners from completing blocks. The attacker cannot forge a signature for another user's transaction.