In my opinion as long we accept scam like ponzi, hyip and all the other shit which destroy the image of this wonderfull invetion there will be no good future for bitcoin. It still will be a currency of the criminals. There have to be a rethinking.
And yeah that is going to make the businessman who have good business in local places doubtful if they are going to know that there are some investment scams like hyip and ponzi scams but I think if you are going to explain them that you are not going to make business agreement with those sites or you are not being like that, then that would be fine.
All these things have given a bad name to bitcoin and this cannot be undone. What needs to be done is an aggressive advertising/crowdsale in countries where bitcoin is not accepted yet.
Most business are not ready to accept it because of flux in price and the bad name that has been brought, for them bitcoin=scam
It can be undone; if it was not then there will not be any new users, personally I disagree with spending money in advertising since adoption must be organic so we can avoid bubbles and stuff like that.