Instead of telling others what bitcoin is, it's better to go through what we get from bitcoin, and receive a very satisfying result. Later on by other people will ask how you get it all, from there we can explain what is bitcoin on them.
I have the same opinion...instead of proving to someone - be in this professional and people themselves will be interested how you achieved such success
As the saying always goes;action speaks louder than words.as you continue to explain the benefits and advantages evolving around bitcoins ,they will gradually come to understand.This can be fasten by they themselves witnessing practical testimonies from you.