It's hard to explain it to newbies.
I never talk about bitcoin to my friends or people around me, as the price of bitcoin is really disappointed.
SEE and this is why you should not introduce the currency as a commodity to invest in.
INSTEAD you introduce the currency as a currency to use to buy things.
When did anyone ever introduce a fiat to you talking about its exchange value with other currencies. Most people come into contact with 'foreign' currencies when they visit other countries, and at that time you really, for practical purposes, don't care what the exchange rate is you just want the local currency so that you can buy things.
How you convince someone to be interested and use bitcoin is dependent upon the target audience, but the three easiest ways to do it are:
1) Go to a store or restaurant that excepts Bitcoin and buy something with bitcoin in front of them (repeat if needed)
2) Send them a off the chain tip or gift with coinbase or changetip that gives them bitcoin without them having and account yet and lets you know if they setup an account to claim the free gift(by returning unclaimed)
3) Buy something on amazon for 15-25% off with purse.io or brawker in front of them and brag how bitcoin saves you so much money.
BINGO ... give them money and have them BUY SOMETHING!