I don't know what the difference between an investor and an ordinary person is. I only know the thinking of an investor that they are always looking for ways to make their investment profitable because I am also an investor. and ordinary people I don't know what they think.
You are not an investor forever, what did you do before? I think investor is like a profession, you can be amateur or professional, it's something you learn to do and with time you become better, if you know what you are doing. Ordinary man is just a man without specific profession, even if he have some investments it's not something he do often, he don't this k about becoming investor. But probably every ordinary man have an opportunity to become investor if he wish to.