Maximising Blockchain Collectible Economies

What is the optimal size for a blockchain collectible (NFT) economy? How many unique items should be in a collection? How does one maximise the value of this economy? These are very interesting questions, because there's a trade-off between scarcity of a collectible economy & its inclusivity (allowing users to participate through ownership of a collectible). Currently, many projects in the space simply thumb-suck the size of their economies or employ unproven generation of new collectibles. The projects either generated too much or too little.