Yes, I believe in time travel. I want to go back to 2009 and buy many bitcoins.
Don't make me laugh. If you had the ability to travel in time all you could think of is buying bitcoins? I know we are on a bitcoin forum but this is so childish

You really wouldn't want to see ancient Greece, Egypt, bring home some artefacts from the jurassic period, but waste this to go back 5 years and buy bitcoins. You could just invest in Apple in the 80's...
Why go back to just 30 years, when you have the capability to go back millions of years? Here is my plan. I will purchase a few AK-47s and a few thousand rounds of ammunition. Then I will travel back 2,000 years to some Latin American nation. I will become the chief of some small tribe, and using my firearms and knowledge of technology, I will conquer the entire world in less than two decades.