Whenever the topic comes up at work or something (which is happening more and more). I usually just start with what people are feeling now. Inflation. Explain how that works with essentially a puppet master controlling a currency backed by nothing. I wait for that agreement and then I bring up bitcoin and why its a better solution. I dont shout about it from the rooftops about how they should buy but I give them the facts and that at least opens peoples eyes to make their own decisions.