US M2 (physical Federal Reserve Notes plus digital dollar credit like checking deposits) is around 20 trillion USD US stock market capitalization is around 55 trillion USD plus all the private businesses, private homes/cars/effects, plus all the public infrastructure, plus all the foreign assets in countries where dollars are widely accepted USD is not worth anything like the market value of all assets offered for sale in dollars so if "all the stuff in the world" is worth however many trillion or quadrillion USD and somehow Bitcoin takes over as the world money, it doesn't follow that Bitcoin will have a value equal to that many trillion or quadrillion