What is ATM cash trapping?

Excuse me, could you please explain what ATM cash trapping is? I've heard of it in the context of cryptocurrency and finance, but I'm not entirely sure what it entails. Is it a type of fraud or a security measure? How does it work, and what are the potential consequences if it's not addressed properly? I'm curious to learn more about this topic and how it relates to the world of digital currencies and transactions.