It is affected by both fraudsters and novices who failed in their investment. One, there are really some horrible people who try to deceive newbies by offering to trade Bitcoins with them. This is one reason why people think that Bitcoin is a scam. However, there is another one. One wherein novices who lose their money on trading accuse Bitcoin of being a malicious scheme. They lose their money because of trading mistakes but they put the blame on the coin. Sadly, they think that they have been scammed.