Many single people help to provide financial support for their lived ones; such as, providing money for their siblings to go to college, money for their parents' living expenses, or contribute to their church or charities.
In addition, many single people will choose to get married in the future. One day to guarantee life insurance protection for your future family is to purchase a life insurance policy now, while you are young and healthy, that way you can lock-in a low rate that will be guaranteed to remain level for a long period of time.
Also, remember that you can buy life insurance and name someone as your beneficiary, and if things change and you get married, or choose to change the beneficiary for any reason, you can do so - just contact the life insurance company and request a beneficiary change form. That way, you can leave the money to anyone you want and change the beneficiary in the future, when your life needs change.
Here's a list of top 10 reasons to buy life insurance coverage.