My nan, who is in her mid-80s, read in a newspaper about the man who wants permission to search a landfill site for his lost hard drive with hundreds of millions of pounds worth of bitcoin on it. She asked me if I could explain what bitcoin is because she didn't understand it. I'm like a technology expert to her because I help her when she has trouble with her TV, but I barely understand bitcoin myself, and even if I did, I don't think I could explain it in a way that she would understand it