What would my superpower be?

If I had a superpower it would be to travel through time. This would be my super power because with it you an become the most powerful person not of earth but of the whole world. I could do things that benefited me but also that benefited the earth and everything in it like humans. I would use to travel to the past and invest money on stocks that I would know would grow a lot and invent companies like google before the original creators and become a billionaire. I would become one because I would know which companies would become the biggest and which would go broke. I would also travel to the future to prevent catastrophes but I would not change the past because it would alter the present. Not even to prevent a world war because if I did, many great things could not happen and maybe change something so that may prevent me from being born. I would also go and see what really happened to things that we are not sure like the size of the Persian army when the attacked Thermopylae or the real cause of Hitlers death. Or even Jesus to see if we have been lie all this time. I would also bring back relics and paintings that are very significant to the world and open a museum or bring some that are not as important but would be destroyed like the Jesus painting that an old lady ruined in Spain. Also some of very important painters like Da Vinci or Galileo's text before they get destroyed. With this power I could make a Utopia by destroying any kind of disease by traveling to the future and bringing back the cure. I would do this to save many lives of people that may be important or be significant to the world. I could also go in search for answers that have been bothering us for centuries and why are we here just by traveling to the past and looking at it with my own eyes or looking at researches in the future that would help us understand better why are we here. So I would be richer and more powerful than anybody else that has or will exist. Everybody would love me and I could have whatever I desired and whenever I did. So for me this is wh it would be the world's best super power.