This Seeking Tech guide will explain how you can get the Hidden Wealth trophy in Sly 2 Band of Thieves (2024) on PS5 and PS4.
To unlock this, you will need to “find 10 unique cash briefcases in Episode 3: The Predator Awakes.”
Use the following video as a reference:
You will find three briefcases locked behind a metal-door at the bottom of the Spice Grinder Destruction stage. You will need a dynamite barrel to break the door to gain access to them.
After completing the same stage, you can open the green barrier on the upper-floor to access more cases.
The other three can be found after you complete the Spice Room Recon stage. These are also located behind the green barrier.
The trophy will unlock after breaking the 10th one.