Buffett chose in his letter to create the visual image of congealing all the gold ever mined in the history of the world into one huge cube that would measue 68 feet on each side.

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And just for fun, we brought you the world's largest Rubik's Cube mosaic -- which stands over 13 feet high by 200 feet wide and is made from 85, 794 cubes.

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In line with other art-world powerhouses like Gagosian and Ben Brown, White Cube chose Hong Kong for its first foray into the region, and this is also the esteemed contemporary art gallery's first overseas branch.

BBC: White Cube gallery opens in Hong Kong

Warren Buffett, one of the world's richest investors, says the total amount of gold in the world - the gold above ground, that is - could fit into a cube with sides of just 20m (67ft).

BBC: How much gold is there in the world?

Imagine if you were a super-villain who had taken control of all the world's gold, and had decided to melt it down to make a cube.

BBC: How much gold is there in the world?

The billionaire investor Warren Buffett has famously said that if we put all the gold in the world into one room, it would take up the space of a 67-meter cube.

FORBES: Does Gold Belong in My Portfolio?