The spiritual world has two equally useless positions on money.
The first: money is corrupt, ambition is ego, wealth is an obstacle. Renounce everything. The second: money is just a tool, God wants you to be rich, abundance is your birthright. The universe provides.
Both miss the actual teaching.
The Bhagavad Gita's position on wealth is subtle and demanding. It does not condemn wealth. Arjuna is a warrior prince — rich, powerful, capable. Krishna does not ask him to give it away. He asks him to hold it differently.
The word is Asakti — non-attachment. Not non-possession. You can own things. You are not to be owned by them. The test is not how much you have. The test is how you feel when it is taken away.
Your relationship with money is a precise mirror of your relationship with security. And your relationship with security is a precise mirror of how much you trust the ground beneath your feet that is not made of money.
The Stoic equivalent: Seneca was one of the richest men in Rome. He wrote endlessly about the dangers of wealth. A modern reader might call this hypocrisy. The Stoics called it practice. You do not develop freedom from attachment by having nothing. You develop it by having things and repeatedly noticing your relationship to them.
Holding money without attachment looks like this: you work for it with full effort. You make decisions about it with full intelligence. And when it leaves — through market forces, bad decisions, necessary generosity, or simple misfortune — your sense of who you are does not go with it.
This is either very simple or nearly impossible. The difference depends entirely on where you have located your security.