The other day a Steak 'n Shake worker watched me pay my tab with bitcoin. She was interested, and said, "so, is it like Venmo or PayPal?" The place was busy, and I knew I had about 30 seconds for a brief explanation before she had to get back to work. I completely blew it, mumbling something about scarcity and real money. She said "oh" and walked away.
I have heard more than once over the years that you really don't understand something unless you can explain it simply. I failed that test. I want to be better prepared next time.
Are there any workable explanations that can be delivered in 30 seconds? I know bitcoin is complicated, but I would like to have a clever response that could at least inspire more research.