Both life insurance and a 401(k) can be investment tools. Determining which is the better choice for you will depend on your long-term goals. Because they serve different purposes, you may be interested in both.
401(k) plans are better for retirement planning. The returns are typically better because they are designed for retirement and will benefit you once you end your career. On the other hand, life insurance is better for estate planning because it focuses on the death benefits that your loved ones will receive if you pass away.
Although some types of life insurance have a savings portion, that is only a bonus, and investment returns aren’t very good. Returns aren't even guaranteed in most cases, including variable life insurance. That said, these types of policies make a life insurance retirement plan an option for those interested in leaving a legacy or supporting dependents after passing.