I really can't believe that there are still people who thinks Bitcoin is a scam. I could understand if you talk like that about a new cryptocurrency in the market. But we are talking about Bitcoin. It has a 11 year history and it continues to be better. Any people who do a search about Bitcoin can realize that they are wrong.
No, that is happening out there. While people can make money from bitcoin, other people who don't like bitcoin will always tell that bitcoin is a scam and will make people lose their money if they invest in bitcoin. Perhaps, people who say that bitcoin is a scam are people who lose their money because of investing in other programs offering them to use their services to make more money. But those people will see the truth, and they will not say that bitcoin is a scam again.
People are free to invest in bitcoin or not, but they need to search for more details about bitcoin, and they need to know how much money they will use to invest in bitcoin. If they can make money from bitcoin, they will try to use more money to invest in bitcoin, and they will invite their friends to use bitcoin as an investment.
Only for people who do not know about bitcoin, even there are many people who know only a little bit about bitcoin could rise from nothing to $20k said it is a manipulative asset or gambling device like Warren Buffet. Depends on their perspective, people could say anything about bitcoin, that's why they have to learn about the fundamental things regarding bitcoin. It is not a safe-haven asset for the short term and we don't know what will happen for the long term, but so far bitcoin doing so good to this point.