Why would one of the world's richest men bet $100 million on Apple (NASDAQ:AAPL)? The same reason any investor makes an investment: They believe the stock is going to go up.

In the video below, Fool contributor Daniel Sparks compares Apple head-to-head with Google (NASDAQ:GOOGL) to illustrate exactly how undervalued Apple is, even with growth expectations taken into consideration.

Fool contributor Daniel Sparks has no position in any stocks mentioned. The Motley Fool recommends Apple, Facebook, and Google. The Motley Fool owns shares of Apple, Facebook, and Google. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.