Okay, I realize that the odds of time travel actually becoming possible are nearly non-existant, but suppose that, somehow you found yourself in the past, one month before a significant event in history, say the bombing of Pearl Harbor, 9/11, or some other event. Additionally, your trip is one way, once you find yourself in the past, there’s no way for you to return to the future, but you are in possesion of an amount of money which is double the average income of the time period in which you’re in. Should you alert the authorities as to what’s going to happen? You have no evidence other than your word as to what’s going to happen, but you might be able to have an impact on future events if you tell someone. Would it be wrong for you, morally, to take a portion of that money and invest it such a way that you’d be able to profit from the coming events, even if you alerted the authorities and they took your claims seriously?
For example, say you find yourself in America on November 7th, 1941. You alert the government that the Japanese are going to attack Pearl Harbor in one month. Now, even if the US government believes you, and takes steps to prepare for the attack, the US is most likely still going to find itself in WW II, knowing this, would it be wrong for you to invest in the various companies which are going to thrive thanks to the war? You know, for example, that GM is going to be building lots and lots of things for the war effort and that after the war, they’re going to be a prosperous company, whereas Studebaker and Packard (two other car companies) are going to survive the war, but not last much past it. Would it be wrong of you to invest in them, morally, since you know the future?
If you found yourself in the body of an 18 year old male at that time, would you enlist in the military? Or would you find some way to avoid the service (say by going to college) since you know that the Allies are going to win the war and your service in the military wouldn’t be essential to the US winning the war? What would you do if you found yourself in Nazi Germany or Imperial Japan?