holding is not much good if you can't sell it to buy stuff.
Discussion
But I'm not asking for self-spending
Custody involving less than 2 people makes sense as a goal, a transaction involving less than 3 people could make sense as a goal when using precious metals, but a transaction involving less than 2 people would never seem to make sense and it seems reasonable to expect many people involved in each cryptocurrency transaction (unlike precious metals for example)
To be clear - I mention a "third person" partly because you can transact silver one-on-one, face-to-face without an arbitrary fee but it doesn't teleport across the planet in 10 minutes like Bitcoin