Assume that the future can change based on your actions, so any historical information that you bring along with you from the intervening 25 years may quickly drift out of the new realities history.
Edit: also assume that you can be given a healthy 21-year-old body if you want or take your previous self’s place.
Further, identification will be provided for you if you were not born at that time.
Invent Apple Google and Amazon all at once. Yes, I know they all existed at that time but I would just do their best ideas before them.
New Pied Piper
Why not go with original ideas like Facebook, Uber, Bitcoin, YouTube and
RedditLemmy?