Iran's financial collapse cause- Shutting down of Ayandeh Bank with $5 billion in bad loans and printing of money to cover bad loans by Iran's central bank. A lending mechanism was started by the central bank to give loans to well connected private banks that serve a small sliver of the population without collateral. This money was wasted and loans turned into bad loans which the central bank covered by printing more money. The result inflation of over 40%.
The protests reflect financial distress, and deep discontent among ordinary people.as the money has gone to a well connected elite.