I think what the author imply in this:
The same is true for investing. Research every stock you buy, every investment you make. Don’t follow the hype, don’t trust talking heads, don’t rely on hunches or instinct, don’t follow one or two simple rules/factors and ignore everything else about your investments. Remember that risk and reward are on a curve, and reach for the top of that curve. That’s the way to win the investment game.
Nothing new here, and as a rule of thumb, you don't need to over complicate things. I think this philosophy has been one of crypto tenet's: DYOR (Do Your Own Research). Which is very true, to minimized risk and to have a chance of greater reward, then obviously, you should do everything at your control and research first and not follow the hype around a project, simply as that.