let’s assume like 10 years younger. so I’d be 8. find some gimmick to get money quickly, this would be easy as somebody who knows the future and has a basic understanding of the stock market (cannot trade as a minor but can absolutely get someone to do it for me). That gives me years to be a child prodigy and accumulate wealth before the economic collapse that I know is coming. At 14 I will have done enough to be satisfied for life and I would fade back into obscurity and just pursue the childish happiness of my dreams, since my future would be set up for me!