If you tell people that you bought stuff in the internet or even in a shop with Bitcoin, people will become aware of Bitcoin, more so if the stuff that you are showing them have value when you bought it with fiat money, what do you think about this?
That can be a strategic way on how you can make people aware of bitcoin's existence but still you should find more effective way on dessiminating knowledge about it. You should find a proof like a receipt or anything that proves that you bought it with bitcoin so that they would believe and start patronizing bitcoin afterwards. Make sure you tell them the some basics about it before making them start investing on bitcoin.