Evangelism is about getting out there and getting in view of the potential seekers.

It plants seeds. People have to hear about something over and over, before it sticks in their head. And then they have some experience, where it suddenly mentally "clicks" and they go off to search, but that click wouldn't have happened, if they hadn't been evangelized over and over.

It's like that with Bitcoin, too. I knew about it for years, before buying any.