I think that is a difficult thing because if we look at the negative side too patently and will result in large losses so that people will feel scared because the risk is too high especially if there is fraud most investors will be traumatized if it happens
Yeah that is the effect of bad news spread by the media, it needs a big power like the government to say that bitcoin is a safe currency and the legality of bitcoin has been made, of course there will be many people who then use bitcoin as a currency and many will receive it
So this means a word of mouth won't just be enough for people to openly accept bitcoins.