I'm sure New1954 and a few others who feel very strongly about this topic could get a good laugh.
So here it is:

But going forward, what should the
RCM do? Any coin over $100, $200, $300... should have a special box?
Personally, back in the days when I had lots of NCLTs I preferred "similar" boxes because they all stacked up and well aligned. The cassette tape boxes were good for that.
What about something like the proof and specimen sets where the coin could be inserted with a slab similar to what TPGs provide? In principle, you could buy/sell the slab or just the case. This is just a quick rendition of this concept:

I would allow the slab to be opened just like the sets. I'd leave that up to the collector to seal the slab...
Or we have the capsule inserted inside a simple holder that can flip. Just some ideas...

Another idea would be to have something like the iPad where the velvety cover can fold in different configuration for display purposes.
On the $200 for $200 the
RCM did try the flip concept but unfortunately the lid doesn't fold out in any useful way. The box is too tall for no reason and the capsule is too loose inside the box so the coin could fall off when flipping the cover.
But all those things would cost money... and would raise the price of already hugely marked up coins.