The perception, what's the value (not necessarily price) of houses and land here in Czechia is something I'm trying understand better myself. It's really interesting topic, however tough task. There were no official statistics around 1925 (which I picked because our crown was gold-linked, it was reasonably long after the Big War and before WWII).
average family house is the same, around 180oz give or take.
After wwii, soviet fuckers and currency linked to euro and usd the price jumped from 150k to 6-10m.
national currencies are not store of value, you're right. From my pov they're not money. exactly because of that they can be printed cheaply.
gold was money, bank notes backed by gold were money, anything what can't be easily inflated can be money. this property makes them store of value. because if I transact with you I want something what guarantees me that it's value won't disappear and I can use that to buy what I want the next day.
same thing is savings (which is a different word for hoarding). I don't spend (everything) because I expect goods will be cheaper in the future (either same thing will be cheaper or there will be a better equivalent; e.g. computers or washing machines, cars. look at their prices/value 20 years ago relative to your purchasing power)
If they hold coins they reduce supply, which raises the purchasing power of the remaining coins. that's not price control.
Bitcoin would only "fail" if ownership concentration came from coercive state privilege rather than market transactions. That might happen, but it's not the case now.