Could be a really interesting time cross project? He showed up in 2003 and turned $800 to hundreds of millions in 2 months through the stock market. After he was arrested he claimed he was a time traveler from the future.

https://mysteriousfacts.com/andrew-carlssin-the-time-traveler/

Well. That is interesting! Apparently documented.

This reminds me of the story of John Titor (https://en.wikipedia.org/wiki/John_Titor).