What about cards that have the potential to show good results across all formats and not just one? Well, these kinds of cards become super expensive due to the very high demand.
Urza, Lord High Artificer is that kind of card from Modern Horizons. It's already been recruited into the Paradox Engine decks, and Commander players can't wait to build around it, too.
It already has a rather high price, which means that it has the potential to go even higher. How high? Only time will show.