Most people I talk to about Bitcoin think that it's fake money. The most popular question is "How can it be money if it is not backed by anything? You can't hold it!"
This is usually when I have to use similes and metaphors that naysayers can understand.
Here is my explanation:
Yes. Cash is a tangible asset. But there are plenty of things we purchase that have value that we can't physically hold. Software, music, ect..
Try buying something with cash on Amazon. You have to turn that cash into digital currency via credit or debit then use a set of numbers on a card to make a purchase. Just as a credit card is used a vehicle to transfer value so is bitcoin.
Bitcoin is really not a currency but a vehicle to transfer value without a centralized bank or fees. Transactions settle in minutes, not days like a bank plus bitcoin can't be double spent or overspent.
I think because bitcoin users call it a currency, people think that it is money made from nothing.