Now that bitcoin is more valuable in most countries, that shouldn't be a property it should be an investment, those who see bitcoin as property should learn more or read more about bitcoin and how it works.
To me, bitcoin is an investment and also a treasure, I don't know if am wrong or right.
But if someone may ask you, what do you call BITCOIN?
Early Bitcoin investors that hold Bitcoin since 2012 can easily say that their Bitcoin is their property, a property that doesn't depreciate in time, I don't see anything bad about calling Bitcoin a property, it's mine, I own the private key, that makes it my property.