Are you scared of growing old?

For context, I have no desire to get in a relationship, marriage, kids etc and I enjoy being alone. I've planned my life so that I'll be working in a new country every year or two, then at a certain point between 35-50 when I get bored I'll move onto some land and become largely self sufficient.

Although this will make me live a very happy life, I still fear being old and alone, not having kids or grandkids to look after me when I can't phsycally move. I did this for my grandparents, and probably will for my parents which is what triggered me to think about it