Just ask, don't push it, if they want fiat give them fiat just ask them if they know about Bitcoin and make sure you don't fuck them.
Got your point in there mate. We cannot force anyone anyway to just accept bitcoin without the knowledge of what it is in the first place and on how it works and of what advantages we can get from it. But atleast give those who are not aware yet the awareness of what bitcoin is by introducing them to it.