A possible concise summary is:
Mario agrees to sit on a dodo bird egg for Goodman in exchange for paying off his house. However, Jeffy tries to break the egg and switches it with a regular chicken egg. Goodman reveals that the egg was a prank and he was betting with other billionaires that Mario would destroy it. He then gives Mario a dinosaur egg to sit on.
Here are the key facts extracted from the text:
1. Mario is asked by Goodman to sit on a dodo bird egg that is worth 10 billion dollars.
2. Jeffy tries to break the egg by throwing it off a balcony, using it as a cue ball, and putting it inside a safe.
3. Mario switches the egg with a regular chicken egg and gives it back to Goodman.
4. Goodman reveals that he was bored and making bets with other billionaires on whether Mario would destroy the egg or not.
5. Goodman asks Mario to sit on a dinosaur egg.