he don't believe what? that bitcoin can surpass fiat, that can rise to 10k? or that simply bitcoin isnt' real but just a ponzi scheme and nothing else like many depict it...
personally i would try to convince him, you can do it pretty easily, by starting with saying that bitcoin is money
yeah. right now it is no hard to convince many people to accept what benefits bitcoin has to offer . but when the price goes up everybody will be interested in it again.
just like before when the price was going up i could hear everywhere that people are talking about bitcoin