Americans have a 50% chance of dying from atherosclerosis and 0.05% chance of dying from a terrorist attack.
-Factfullness by Hans Rosling
Furthermore, atherosclerosis causes more complications that can be found on WebMD.
You can be on the half that doesn't die of atherosclerosis by simply exercising moderately 150 minutes each week. Whatever you do, don't be INACTIVE. Walk, run, take the stairs, after every half hour of sitting get up and stretch, do resistance training and take care of your only real possession :)