At first I thought I would vote "No", but then I realized I did meet a Bitcoiner back in 2018.
I already bought some bitcoin before meeting him. Somehow, we arrived at this topic and he was very convinced by bitcoin. I think he got into Bitcoin very early on and thus was very knowledgeable about it. I remember him telling me "if the price drops, I am going to buy more" and me feeling very confused what to make out of him.
Then we lost contact (only knew him because we took the same course in university) and I forgot about bitcoin for the next 2 years. Never met someone like him afterwards.
There is a monthly meetup in my town. Maybe I'll go there some day.