"4. IT IS ABSOLUTELY NECESSARY TO HAVE AN EDGE
You can't win without an edge, even with the world's greatest discipline and money management skills. If
you could, then it would be possible to win at roulette (over the long run) using perfect discipline and risk
control. Of course, that is an impossible task because of the laws of probability. If you don't have an edge, all
that money management and discipline will do for you is to guarantee that you will gradually bleed to death.
Incidentally, if you don't know what your edge is, you don't have one."
-Jack Schwager
Had to put this here to remind myself of what happened recently.