If you hold back, your knowledge is still in the thought waves that circle the planet and it will just emerge elsewhere. Then, those that held back the progress and well being of humankind will take their proper place in the dustbin of history.
A thought provoking question indeed.....what are you holding back?
I think you would hold back sufficient so as you were not made a ruin of, or threatened, or at the worst had a timely accident, I know this is not energy related "or is it", just look at Snowden and tapping, I'm sure there were many plans made by the U S government of how he could have a timely accident, seems the Russians are now looking after him very well indeed with a high paid job and lots of security.
"All truth passes through three stages. First, it is ridiculed, second it is violently opposed, and third, it is accepted as self-evident."
Arthur Schopenhauer, Philosopher, 1788-1860
As a general rule, the most successful person in life is the person that has the best information.