Dollars and Euros and other currencies are not a limited resource, nor are they based off of any kind of limited resource. They literally just print more whenever they want.
There will only ever be 21 million bitcoins. There can never be more than that. Of that 21mil, 19.8 million have been mined. Of those mined, it is estimated that 2-4 million coins are lost. More can not be created, more can not be found in an asteroid, more can not be wished into existence. It is a limited resource.
