Is it necessary to buy social security at 28

Social security, except for pension insurance is only after retirement can start to use, the role of the other four insurance will be used at any time. When you get married and have a baby, maternity insurance will come in handy; when you lose your job, unemployment insurance will come in handy, and similarly, workers' compensation and medical insurance will come in handy at any time. These have little to do with how far you are from retirement and whether or not you will live to retire, but instead will be used when you are young and in the middle of your life as you move into old age.