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?
Thats not really necessary. When I talk to people about cryptocurrency almost everyone already knows about it and telling them that you purchased with Bitcoin is not going to make them interested in it. Those that even developed interest in Bitcoin didnt do so because they heard that they can use it to purchase from stores, they only decided to buy Bitcoin because they saw the possibility of making profit from it.
Bitcoin is volatile, so how exactly do you except them to be funding their wallet without plans of making profit in return?