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We can't drag them to believe what we think about Bitcoin and they have different understandings and wants with their life. Actually, I did this before to my office mate but only 1-3 of them give some positive replies or of having an interest but after having bad experience( because of knowledge barrier) they also quit. Not a failure of me or even at you, we want to help them but is some ways it looks different and of different minds.
I think that even if we are let down, we should keep trying to make inform people about bitcoin. The best place to start is your family or your relatives or maybe your close friends. Make them aware of bitcoin and they will be definitely more interested than any stranger you would've talked with.