I personally tell them about the decentralized nature and the lack of a middle man in transactions. What would BCT recommend to grab attention?
The decentralized nature is it's biggest selling point. Sadly, though, many people are not that familiar with economics or how the fiat monetary system works so they're not that bothered by it.
They don't give a fuck. I've tried explaining Bitcoin's supossed selling points to the average folk and they only start paying attention by the time I mention it can increase in value and they can win money.
Well then try sell them on the potential investment idea of bitcoin, though of course the opposite is true and you could easily lose money. Bitcoin just isn't for everyone at the moment, but hopefully they'll realise their mistake of not getting interested when you tried to tell them, then you can feel pretty smug about it all.