"> Don't tell others what to do

Why not?"

Because it's rude, condescending and self righteous.

"Everybody does it, including you in the above sentence :)"

In German we say "how you shout into the woods so it echoes."

I won't argue with all the pessimism you uttered later but it's astounding how some people manage to deny even to most gigantic successes) A billion? Boooh!