Currently there is no way to keep your development progress and private assets hidden without closing yourself off to be able to trade items or have players view your hats/clothing/etc. A feature that lets players disable the part of their inventory they want to keep private while still keeping the less confidential stuff like hats, gamepasses, badges, etc to the open would be great.
Two categories would likely be substantial, one for game assets and one for normal stuff you run into on Roblox.