Financial crises like the subprime mortgage crisis and the recent pandemic can have a big impact on the global economy. This study looks at different types of financial crises, like banking and currency crises, to understand how they happen and what effects they have. By studying past financial reports, the researchers found that when one country has problems with their money policies, it can affect the whole world. Speculators and pandemics can also make financial crises worse. The goal of this research is to learn from past crises and find ways to prevent them in the future.