Only in an artificial situation. Usually, the value of all bitcoins combined shouldn't be able to exceed the value of all assets of all economies. What could y

Only in an artificial situation. Usually, the value of all bitcoins combined shouldn't be able to exceed the value of all assets of all economies. What could you buy with those coins if not those assets? You can achieve an arbitrary value though if somebody needs to buy an arbitrary small fraction of a bitcoin for some value. But that would only happen if e.g. someone's life depends on acquiring that small fraction.