Add elements of ownership and possession.
Elements of ownership and possession is the fourth part of the Octalysis Framework. The older a person is, the more attached they are to their things. We all like to collect things. But what’s more interesting is we value things that are already ours much more highly than things that we do not have, even when the market value is exactly the same. The perceived value of our own watch is much higher than of a watch on the store shelf.
That’s why this strategy is so powerful. Once a user earns something in the product, they will be much more engaged and will value the product more—because of the virtual good they have there.
While implementing this, remember that you always want to motivate users to make a desired action. You should start with a question: What do I want the user of my product to do? Then design a system that will make your user to do this.