What If You Were a Billionaire for a Day is a free interactive decision simulator where you start with $1 billion and 24 hours to spend it. Every hour presents a new scenario — donate to charity, buy a sports team, fund clean energy, or throw the world's biggest party.
Each of 24 rounds presents a scenario with 2-3 choices. Your decisions affect four stats: Wealth, Reputation, Happiness, and Legacy. At the end, you receive a Billionaire Profile.
This simulator lets you explore that. Most people split between philanthropy and personal purchases, but the most interesting results come from the trade-offs.
1,000 millions. If you spent $1/second, it would take 31.7 years. If you earned $5,000/day, it would take 547 years to earn a billion.
No right answer. Utilitarians maximize Legacy. Strategists grow Wealth. The most satisfying path is usually a mix of all four priorities.
If you enjoyed this, try these: Spend a Billion · Moral Dilemmas · How Rich Are You? · Live Abroad
Last updated: March 2026 · whatifs.fun