One factor that makes the bitcoin a scary investment is it legal reaches in a certain country whether this is classified as illegal item or not is up to the country you live in, another is market fluctuation reports in each year this scare investors in a way that they might loss a lot when there is a plunge fluctuation in the market and lastly is the bitcoin's reputation to uninformed investors, they might be introduced to bitcoin in its use for illegal activities such as online drug trafficking, weapons dealing, killer for hire, or prostitution. This ugly facade is the first thing that will pop-up to their minds.