Both data and money are important to the side of casino. For us, of course our data is important because it contains our KYC, identities and other important details about us. But once it's exploited and saved by the hackers, it'll be passed on and sold to whomever they will sell it.
Now based on this, do you feel a casino is more likely to be careless with people's data than they will with money to hackers because most hacks seem to target money they have more?
I think this question isn't just for the casinos but also to the exchanges. IMHO, both stands in the same feet about personal information of their customer and as well as their funds. They both care for it because they're operating under a rule of a law, a regulations so they have to protect it.