LOL Taking selfies will be profitable when Appics gets going...then they can get paid to take selfies.
As for the other stuff, I know where you are coming from @wonderwop. I get that also. Unfortunately, it isnt up to you to teach them about cryptocurrencies...
Just ask them if they know how their car runs (make sure they arent mechanics first). When they say they dont know, say, see you still drive. Just go comment, upvote, and post and dont worry about it...
And yes when there are 50K signing up a day, the cat will be out of the bag by then...and it will be quickly moving past the early adopter stage.