- I've never heard of it.
- I've heard of it but don't understand it.
- I understand it, but I don't see how it's useful.
- I see how it could be fun for rich people, but not me.
- I use it, but it's just a toy.
- It's becoming more useful for me.
- I use it all the time.
- I could not imagine life without it.
- Seriously, people lived without it?
Source: Innovation Isn't Dead, By Morgan Housel