Reported
Reason: "Still not working even after DRP treated it...".
Checked by myself.
Nothing is unlimited. Tried to upgrade my skills with coins, it doess indeed consume your coins and you can't use more than you have.
Proof:
Emulator, LDPlayer 9 Version 9.0.66(9) (Android 9) rooted + patched
Currencies aren't unlimited:
gyazo.com
Virtual Machine, VMOS Pro Version 3.0.0 (Android 9) rooted + patched