People spend time in bitcoin because they see a future from it , in their financial status which bitcoin has a big impact for their lives because they lives with it and its their source of income financially. And i also spending time in bitcoin just to earn it and have a big profit from it when the time it goes high again in its value.

I think the best form of marketing is word of mouth, if there is a good project then they don't need to shout it from the rooftops, people will realize the potential and they'll tell others about it, soon it will spiral and the project will be very popular.