If I had a dollar for every time someone did something stupid,
I would have approximately 7.8 Billion dollars.
Listen up, buttercup. This joke is about how the joke teller would be rich if they got a dollar every time someone did something stupid. The punchline is the person would have 7.8 billion dollars which is like...the population of the world. The joke is implying everyone is stupid, especially you for needing this explained!
Mather
A good joke
Anonymous
...a PENNY each would be that much...