Nice opportunity you got there!
You can talk about how RFID actually works, for example the fact that it is passively powered and does not use batteries. That’s already a reason why tracking is impossible.
Currently I use my Apex mainly for storing files with my project:
https://forum.dangerousthings.com/t/nefs-a-rudimentary-filesystem-for-nfc-devices
But I also use it for OTP and as a cold wallet for my Ethereum.
I would probably not talk about Walletmor and payment stuff, because that might get you into some hot water regarding the current status of things with EMV.