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.
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.