It is not even necessary or compulsory that everyone must invest in Bitcoin or believe what you tell them about Bitcoin investment, everyone has the right to believe and chose whatever they want until they realize they are either making the wrong decision or choice or they are making the right choice. The way Bitcoin has grown and the way the world is getting civilized I don't think people who still sees Bitcoin as scam are that plenty as a matter of fact some people are striving to gain the knowledge on how to start because of the potential they have seen in Bitcoin there is no where you would mention Bitcoin that people won't see it as a big asset.
Well, you are right.. everyone has the right to make decisions of their choice, whether the results will be positive or negative, it's their choice. But there are still more people that don't get the idea of Bitcoin, even though they have heard the name but they are not interested to know what it's all about.
So, just you have said, because of how potential Bitcoin is, it has also motivate some people to pick interest in it, which is good for people to have the idea or even invest in it, because it's going to be a very beneficial assets to them and others too.