Nothing compels you to move, but if you do, you move forward. The faster you run, the more scenery you see – so you have some incentive to run fast.
做个类比很有用。垄断就像是在硬地上跑步。没人强迫你前进，但只要你行动，你就能前进。你跑得越快，看到的风景就越多，于是你就有了快跑的激励。