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?
While this is a great idea to help increase awareness of cryptocurrencies and their uses, and it is the best way for individuals to do their share with helping in the adoption of cryptocurrencies but it is going to take a bigger initiative in order to convert more people into believing in cryptocurrency. Many don't see a problem with just using their simple and easy to use fiat currencies.
Unless a major celebrity or political influencer heralds the usage of and pro adoption of cryptocurrencies, the average Joe will continue to be dependent upon the fiat currencies and will never give cryptocurrencies like Bitcoin a fair shot.