Don't get me wrong, but I personally don't think you need to convince anyone that Bitcoin is this or that - because there is the internet and all information is public, anyone who wants can be informed at any time. Any attempt to explain Bitcoin to someone can actually act as if you are doing it for your own financial gain.
I think the same, if someone wants to think negatively of bitcoin then they are free to do it, it does not affect me at all, at the end the ones that are losing are them and not me, I am still holding my coins and I do not care what others may think about it, in fact over the years I have seen many people reversing their opinion but for the most part this only happens because they take a look at the growth of bitcoin and they want some of it and they try to get information out of me but when that happens I just tell them to look information online as I am not going to waste my time with those people.