If anyone still think bitcoin to be a scam, I do not think the person will be able to realize what bitcoin is actually again, many says bitcoin is a ponzi while many says it is a scam but they are all wrong. I hope they will not miss in the next bull run before they will actually understand what bitcoin is.
The FOMO will catch up to them someday and they will regret not doing a simple research about bitcoin. I think that the first impression of bitcoin as a scam is a good thing because it filters out the people that are financially responsible away from the irresponsible one.