Some people around me still call Bitcoin a scam. Lol, I don't want to spend time explaining it to them anymore. Let them live with their opinion like that when the world is changing. I don't see anything called a scam lasting for many more years like that.
Let people say what they want because they have a mouth and a keyboard and speech is never going to be taxed. 
We are one men armies here, trying to make some money in between our daily lives and if bitcoin is helping us let us make the most of it rather than listening to naysayers, be responsible when you invest and dont invest more than you can lose and you should be fine.
Let bitcoin be dead to them because we will dump on their heads when the price increases and they want to buy bitcoin.