Bitcoin, being a different kind of a digital currency, it breaks down conventional thinking in many aspects. No central regulatory body. The concept of mining. The open-ledger (blockchain), the way miners are rewarded, how transporting value is determined by its packet size and not value, the hash rate, the concept of limited supply. The 100 Million pennies in a Bitcoin, etc.
Its difficult enough for people in the money space to thoroughly understand Bitcoin (we all say we understand it, but do we really?).
For a common person, its an overkill. Its like trying to explain the concept of TCP/IP, Networking, Routing, the Internet for someone who wants to use email. Overkill.
Bitcoin is difficult to understand specially if your mind is not open in business. If you have a stand that earning money online is impossible. But if you really want to earn more money, just need to trust the one who told you about bitcoin or teach you. And you need to seek more information about it and you will saw many evidences saying that bitcoin is legit and you can earn money using it.