And 75% of the ones who do grasp it are like, "Oh thats cool. Good luck with that. Enjoy your 'digital bitcoin e-currency.'"
So basically I dont bother explaining it to people unless they are very intelligent have and a hybrid libertarian/computer geek streak or a degree in economics.
I sit outside reading a fair bit, and one of my neighbours drops by to chat every so often. He's older (around 68?), and loves all the stuff he can do on his computer, but has a hard time with some pretty basic stuff.
We talk about all kinds of things, including current economics and bitcoin.
He's actually interested and has asked me about how to get some bitcoins. He doesn't really understand all the mumbo jumbo, but he understands enough about the way the world is and that this could be a good thing.
I thought it was pretty cool that he's interested in BTC.
It all really depends on who the people are, and what your relationship is like with them.
I got my parents to buy some BTC (well, I bought it for them). My mom was all, "Oh, that's ok... don't worry... we're not worried about the money..." as if it was lost and gone. (They listen to the news a bit too much and actually believe most of it despite my admonitions to the contrary.) I told her how much she was up, and asked her if she'd ever managed to get those kinds of returns ever in her life. "No." She laughed! (My parents aren't really the type to go for bitcoin, or at least without my strong urging.)
So I think that there are possibilities for reaching people.
I've been working on a friend that has been procrastinating with it. Had to jazz him about it today as he'd have been up very nicely had he done anything when I mentioned that he should. He'll jump on board. He trades forex even, so he's well acquainted with the markets, but this is pretty alien for him.
Another friend of mine makes his living purely off of forex. He works a half hour or hour in the mornings and that's all. He's not jumped on board yet, but we'll see. He's the smartest person I know when it comes to this specific topic -- exchange. I know he understands this, but he's got enough money anyways that it just doesn't really matter for him.
But, I think the entire concept of bitcoin is fantastic. It's worth promoting to friends and family simply to help advance a free currency that isn't raped by central banksters.
I'm on board for more than just profit. And I think that's what's going to sell some people - the ideology.