A lot of scams have caused the fear of theft among people and they are regarding bitcoin and its trading a scam. People seem to be reluctant towards investing in bitcoins. How do we ensure them that bitcoins are not scam but the people are. 
Well the easiest way to convince people is through education, literacy about crypto currencies, market fluctuations and pricing disparities. Though it is the most obvious thing to do, many people still don't understand how it works. One other way is through the government, having them consider that cryptos are the big thing and the future of transactions and currencies. When the government starts to consider that cryptos as currencies, the public will quickly follow and accept it worldwide.