You can use labor to generate currency that is then invested so that it multiplies itself, but that is not enough to create wealth. Your currency must be changed into something tangible. To create real wealth, you must acquire assets. Assets include properties, mineral rights, land rights, businesses, equipment, farm land, and other tangible items.
This is why the wealthy get richer without doing any work – they used their early labor to generate currency that they invested in things that increase in or produce value.