Top 20 richest men in the world vs Top 20 richest men in Singapore

Here is the list of top 20 richest men in the world in 2016:

Source: Forbes billionaires

 Here's the list of top 20 richest men in Singapore in 2016:

Source: Forbes Singapore Billionaires

Comparing both of them we can see that while source of wealth for the richest men in the world are through the products they produce, most rich men in Singapore got their wealth from Investments - both in real estates and financial investments.

Why is this so?

• Is it because of the lack of creativity in Singapore to produce world changing products that change the world?
• Or is it because of the land scarce Singapore that enable people to get rich through real estate investments?
• Or is it because Singapore, being one of world's financial centre, is more appealing to investors?

But can we as individual do?