But Kaderin has two and a half hearts left...

Maybe those are Albert's hearts...

That's Alberts Derpys and Kads half

I thought it belonged to the loose change in the couch.

It's the buying power of the loose change as it sits in the couch.

...Does it depreciate over time or gain value?

Dunno. Depends on how tough it is.

It's value stays the same, but the cost of the outside world around it increases.

That's why I said "buying power" and not value. ;)

I was answering/going based off Den's question of whether it gained or decreased in value.

Maybe if you smash some pots you'll be able to fill in the other half. XD

Put money on a shirt, so I have some on my chest at least when I'm broke again.

Also, steampunk pajamas. Clockworks, gears, time pieces and so on.

Moon jammies?

I wish keyblade PJs could be a thing. D:

Dollar sign stuff $$$$$$$$$$