For those who have no knowledge of bitcoin, it is useless to talk about the supply, what they need is faith in bitcoin. To this day, bitcoin is still rejected by people simply because the government, the government is still the most influential authority, once they don't accept bitcoin, getting people to believe in it is tough. Suppose if the US government and other major powers simultaneously declare bitcoin as a better asset than gold, we will immediately see people's acceptance increase rapidly.
Trying to explain bitcoin to someone is a waste of time, try to show them what we get for investing in bitcoin instead, that's the best way.