Techno-thriller paranoid take on it- $25k chips can only plausibly be used in high stakes room , which is probably considerably less anonymous than the general floor. Assume everyone playing with high stakes chips are photographed and kept in a database, probably a relatively small db at that. Facial recognition software would be a given in such a case, and even if identities are not kept with faces, the face of some…
While we're being paranoid - why not use them to frame someone.
Person A: Great work. This week, you're being paid in casino chips.
Person B: What the fuck? OK, fine, $25,000 is $25,000, I guess.
Person A:
Later that day: Casino Employee: OH HAI. What can I do you for?
Person B: I won this $25,000 chip and would like to cash it in.
Employee: OK, no problem. Let me just scan it with my scanomonizer over here.
B: Curses, Person A!
Later that day in the police interrogation room: Detective: Where'd you get that casino chip, B-boy?
Person B: From Person A.
Even later that day:
Person A: I love looking at my stolen casino chips. Good thing there is nobody around to see me!
Detective: SURPRISE! You're under arrest!
Person A: Curses, Person B!
In conclusion, this is a bad idea.