you got me wrong,..
I guess you got me wrong.
I didn't talk about de-/centralization, just about ledgers.
You said "bitcoin is just a number in a ledger, why do we pay money for it?",
I said ""the money on your bank-account is also just a number in a ledger".
That one of those ledgers (the blockchain) is decentralized and the other (the bank-DB) isn't, doesn't make a difference.