7 Trillion.
Gold is just a shiny metal. Eventually we'll mine it from asteroids and the price will, like the asteroid gold. Crash all the way to the ground.
Bitcoin is truly deflationary. People that go all in on gold and avoid bitcoin are short-sighted.
What will more likely come first, enough computing power available to a powerful organisation or government to render bitcoins encryption useless or asteroid mining space ships with access to a powerful and cheap enough energy source to make it cost effective.