What Is the Objective of the Player?

In constructing this very first iteration of the game (aka the MVP), I’m finding it difficult to figure out what exactly the objective of the player should be. The first thought I had before writing a line of code was that the player exclusively strides towards maximizing their profit, and does so by taking part of this greater economy that morphs as the gameplay continues, as blobs (the participants of this economy) adjust to the conditions of the market.