I wrote a book about Bitcoin, and my proud grandma wanted to have a copy. So she got it, said "What a beautiful picture on the cover!" and - "What is this, Bitcoin?".
She doesn't know crypto-currencies, never used a computer. But she uses a PayPal account from her iPhone. How can I explain what makes Bitcoin special to a non-technical person? I don't mean introducing in using, and the existing question "What is Bitcoin?" with its answers is still much too technical.
Such challenges are not rare. I need to explain to my boss why I request some days off to go to a Bitcoin conference, and soon my daughter will want to know why daddy is so excited about his mining rig. My girlfriend needs to understand why I spend so much time researching Bitcoin.
Does anyone know eye-opening words? Perhaps an analogy or a metaphor would help? So grandma, girlfriend, daughter, boss - all may roughly understand and say "Ah, such a thing? Useful indeed!"