First of all, you would be rich instantly. Your investments would always go up.
Secondly, you would know how to manipulate business and political leaders. You could make no mistakes.
Thirdly, you could see any threat coming, and you could take 100% correct, mistake free actions to save people...no unintended consequences. The biggest problem with bold human action is unintended consequences.
If there was a meteor coming in from outerspace in 50 years, you could stop it by forming the necessary business concerns etc. to take whatever action was necessary.
You would know whether global warming actually constituted a threat, or whether resources should be used for other purposes.
9/11? You could stop it.
The things you could do are unlimited. You would also be very successful with the ladies...which seems to be an important ability that everyone likes.