Simply put, if you want more bitcoin the cheapest way to acquire it is by mining. The more greedy miners there are the more secure the network is via higher hash.

Another avenue of greed is the screwge model of sitting on your hoard of wealth. Well, by acquiring more and more every user benefits from the additional scarcity.

Yet another is that if businesses or individuals want to maximize profits they have to offer what the holders want. Naturally this would mean increased quality of goods and services.

To be clear off the bat. The incentives do not mitigate taking advantage of unawares people via scams or whatever other methods people engage in bad actions.