Ive recently got into finance and stuff, I see it as a science of money management. Do you want to know anything about financing? 
Yes, there are some criteria while doing finance, could you list them?
Well yes it can range from health and property insurance to even investing and saving for retirement, But financing is generally just about saving money or not spending as much at one time. 
Is there any specific condition to take health insurance other than our physical health?
Well since it usually covers the whole or a part of the risk of a person with medical expenses, Id say that its just for people who want to stay healthy and have money in case something goes wrong, it can also sometimes cover medicines and stuff.