Step 1:  Find a real use case.
Step 2:  Profit?
The problem:  Step 1.

The whole point is the vast majority of these NFTs have no real use case value.   Do gamers care about centralization versus decentralization when it comes to their item inventories?  Not really, they don't give a damn about privacy. 

What I am annoyed at is that it took so many speculative use cases to result in the almost ridiculously obvious idea to have assets that can be transferred across games.  Why isn't this a thing? Why has it taken a new paradigm to do something so simple?

Also the idea of placing collectible value on a picture of a baseball player on a piece of carboard is silly when you can do it just as easily digitally...  this seems like a decent use case..  Is it?