It is mandatory for everyone to invest in stocks exactly like real estate, dividends (rent) and appreciation (growth), using fundamentals. The more we know about the company, better we are and safe our investment.
If someone picks stock, without even seeing fundamentals, this is scary speculative picks, like tossing a coin head (buy) or tail (sell) . I have seen many times people falling into speculative trap. I myself caught by those traps often, then realized the mistake.
There are lot of well written proven books are there to guide us to grow.