Pretend you are very wealthy for a moment. Your net worth is $25 billion. You are set for life. But you want to make the world a better place and it wouldn't bother you if you could make a lot of money while doing it. Pretend you had a chance to buy something with $4 billion of your money that would earn $500 million per year in profits in just a few short years. That would be 12.5% per year earnings on that investment.
Would you do it if you thought the investment was likely to achieve that rate of return?