Yes, however trading also implies the ability to liquidate positions and "cash out". Imagine a world in which a "stock trader" can exchange shares of one compa

Yes, however trading also implies the ability to liquidate positions and "cash out". Imagine a world in which a "stock trader" can exchange shares of one company for another but can never liquidate all of their positions and go to cash. Most people would not consider that to be stock trading at scale.