Here are a few examples:
* "He's got a whole stack of cash in his safe."
* "I'm trying to build a stack for my future."
* "That car cost a serious stack."
It can also be used in a more general sense to refer to a large quantity of something, but it's most often associated with money.
For example:
* "She had a stack of books on her desk."
It's important to note that the meaning of "stack" can vary depending on the context. If you're unsure, it's always best to ask for clarification.