It might be time to get a nice hutch, but not to store china, silver, and dishes...knives.
I don't display knives or firearms. Knives that I have been handling lately frequently are generally placed on a book case shelf. They tend to get buried on my desk eventually. I keep many of the unused knives inside the factory box. The ones that I might actually want to look at (stored ones) are in plastic boxes called "Really Useful Box" which I buy at Office Depot. I also store fishing reels, nicknacks, rolled coins, and other items (pending bills) in them. They aren't cheap for a plastic box, but they are translucent, tough and neat. Most of the larger boxes for fixed blades are stored inside a plastic tote/tub (Rubbermaid) along with some knives I have little interest looking at often. These plastic boxes come in a variety of sizes.
I believe the wood box pictured comes from Harbor Freight.
Some use tool chests and you can go as large as you like and whatever design fits your needs from places like Sears, Lowes, Home Depot and so forth.