It really depends on how many trips I could make. I am always thinking it would be great to go to back and see what really happened at several points in history. This could help clear up some confusion.
If only trip is allowed, I might just go back to the mid 70s and invest in several up and coming companies. I could do a lot with the earned interest from this. Like buy the time machine and make as many trips as I wanted.
Lol...One trip, invest then come back to the futire a wealthy man and build a time machine that makes multiple trips...Gold! No way to lose.
I like this idea a lot but I know my memory, I would probably invest in Betamax, Blockbuster video and Toys R Us...
You can also be sure that if I left it till a later time and went back to buy Bitcoin, I would return with Bitconnect and Doge...