Possibly. As an initial matter, the casino is not responsible for everyone’s behavior in the casino. So the casino is not automatically on the hook if someone assaults you. But the law might sometimes hold casinos responsible when a patron assaults you.
For example, the casino might have received complaints about a patron being rowdy or touching people without permission. Once they receive this notice, the casino should promptly investigate and ask the person to leave, if necessary. If no one at the casino responds to complaints about a dangerous patron, and this person goes on to assault you, then you might be able to sue the casino. The key is what the casino knew and how they responded.