OP simply stands for "original poster" i.e. the author of this thread which in this case is you.
Anyway, I like your idea of hosting a bitcoin seminar for raising awareness about bitcoin. In my opinion large blockchain summits are not the way to go for spreading this kind of information because the uninitiated will not buy tickets to something that they have no idea about. Meetups are much better with people such as friends, and since most people do not have that many friends, a second group of people to migrate to bitcoin would be people who are having financial difficulties, meaning those people who would have to sell things they own if they get an unexpected bill. Bitcoin would be perfect for those kind of people since it does not inflate ever.
The next problem would be how to find such people because they are usually not comfortable with being unsolicited from a facebook or reddit post. There are meetup services which can help you join meetings with normal people in your area. Meetup.com immediately comes to mind.
I think the next step you could take after holding scheduled talks about bitcoin would be to meet with these people in real life at meetup events, explain to them what bitcoin is after hearing their situations and helping set up a mobile wallet on their phones.