Some of them just live the traditional fiat or the banking system for their salary only (mandatory most of the time).
I guess it will all depend on how we can stretch those kind of examples for them to easily understand everything.
It's all people know, and they also rely on the safety provided by centralized financial institutions because people make a lot of mistakes leading to a loss of money, get scammed, and so on.... most of which will be refunded to people.
In crypto there is no such a thing as being refunded, because every mistake that leads to a loss of money is permanent and people don't want to deal with that.... they want to be spoon fed and looked after.
I never really worry about using my banking app to pay for something online, while I constantly worry about using my mobile Bitcoin client and triple check everything to make sure I haven't made a mistake somewhere. It's a pretty big deal.