People do not fear bitcoin they fear the fact that if they invest in it they will lose everything but i would say start learning a little bit about bitcoin before investing because maybe you can download a scam a wallet and lose everything you have in it.
But more than that, people are unable to understand the working of Bitcoin and a greater reason among all is the unclear intentions of government against Bitcoin sue to which people still don't consider it as an investment commodity. Also, there are many anti myths against Bitcoin in the market which also degrades it value further. Only with proper knowledge of Bitcoin such fear can be removed.