Kudos on taking the constructive criticism so well! I agree that an attacking tone may set off a defensive reaction among friends you share this with. I think approaching it from a more positive standpoint would be appropriate. Maybe something along the lines of depicting regular everyday items of different values like a toaster, an iPad and a car and how they have changed over time in BTC terms and Fiat money terms (USD vs Indian Rupee vs Turkish Lira, for example). I like the idea of having them on business cards to hand out at restaurants, or to friends.