Exactly.
It's called the oracle problem. It's the Achilles heel of the whole idea.
And it's unsolvable. As soon as you want to trade some coin for something real, you need an oracle.
Wanna buy a flat in a world where (for argument's sake) even the ownership of that asset is tracked on a blockchain?
Let's say I come home from holidays and someone else lives there.
How do I then prove it's mine? Because it says so in some computer?
Someone has to believe that is true and let me enforce that ownership tie.
Those persons (a judge, the police, even if robots by then) are the oracle.
And a more common scenario than theft is btw legal ownership transfer.
What if I die somehow before giving the blockchain keys needed for that to someone?
How will my brother inherit the flat?
Oracle.
You're mixing up two issues. The need for oracles is a "hard problem" but it's not the problem in this case.
USDC has a central issuer that can freeze funds because that's the only way you can currently have an asset that "looks like" dollars on a crypto ledger. Someone gets a dollar, mints a unit of the bearer token, and pinky swears they'll redeem it. It's a systemic concern that calls into question the legitimacy of the system, but that's not an oracle.
>> Those persons (a judge, the police, even if robots by then) are the oracle.
they are not. The oracle is always a computer. It is a record in gov db that says you own something.
Judge and the police are the enforcers.
"Oracle" being the cover for crypto bros who dont want to admit they need "the legal system" to fix thier mess. Its all idiology and freedom when you are poor but once you actually own something of value, like a flat, suddenly you want lawyers and police to keep you safe from bad people.