Maybe I have been thought about aging population since I was in 30s.= Maybe I've  been thinking about the aging population since I was in my 30s.  Now that people live long, we call this situation “ a hundred years times ” in korea. My mother told she prepare= prepares for her future by saving money and exercising . I agree with that . I always feel afraid of my future to be positive or not. My best friend gave me an advice that Nobody is not stable to live with the future. = My best friend advised me that everybody's future is uncertain. So you enjoy your life right now not regretly = without any regret. It is  obviously so true = obviously true that I have tried to change my mind. I keep on trying that I live enjoyable. I don`t know why it does not occur about a migrant.