The Who is Satoshi inventory has multiple separate storage spaces:

1. PFPs space, a single user can use up to 210 PFPs.
2. Lands space, a single user can use the up to 21 Lands.
3. Gem space, a single user can use up to 210 Gems.
4. PFP Box space, a single user can use up to 210 PFP Boxes.

The usage limit is the limit of the game function and has nothing to do with the NFT Holding limit. The NFT Holding limit of each wallet address is not limited.