If you have any desire of being rich, you must focus. Put a lot of your eggs in a few baskets. Do not do what poor and middle class people do: put their few eggs in many baskets.
If you hate losing, play it safe. If losing makes you weak, play it safe. Go with balanced investments. If you're over 25 years old and are terrified of taking risks, don't change. Play it safe, but start early. Start accumulating your nest egg early because it will take time.
