Why buy insurance?
There are many situations where injecting a certain amount of cash at the right time may reap rewards far in excess of the value of the cash injected. For example, if someone who needs a car to get to work gets in a wreck and that person does not have ready money to make it driveable may have no choice but to secure very expensive financing.  Receipt of $1000 in ready money to repair the car may thus save the person from having to take out a loan that would cost $1200 or more to repay. While the insurance business has sufficient overhead that it is unlikely that insurance would generally have a positive net expectation even considering such factors, it is at least theoretically possible that insurance could have a positive expected value for both the insurer and the insured (and in some cases it may have positive expected values for both parties in practice as well).
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### Instruction:
Why buy insurance?

### Response:
There are many situations where injecting a certain amount of cash at the right time may reap rewards far in excess of the value of the cash injected. For example, if someone who needs a car to get to work gets in a wreck and that person does not have ready money to make it driveable may have no choice but to secure very expensive financing.  Receipt of $1000 in ready money to repair the car may thus save the person from having to take out a loan that would cost $1200 or more to repay. While the insurance business has sufficient overhead that it is unlikely that insurance would generally have a positive net expectation even considering such factors, it is at least theoretically possible that insurance could have a positive expected value for both the insurer and the insured (and in some cases it may have positive expected values for both parties in practice as well).