Bill Gates could have become the first trillionaire in history with a fortune of up to $1.5 trillion

Instead, he heeded the advice of his friend Warren Buffett about diversification.

In 2014, Gates began to sell off his shares in Microsoft (Buffett convinced him not to keep all his money in one asset).

Bill allocated his capital across different companies, leaving only a minimum in Microsoft.

If he had retained his stake in the tech giant, his wealth would be 10 times greater.

Now the founder's capital is valued at only $117 billion.