> Well, for a while Whole Foods was accepting payment by Bitcoin. That means if you know Whole Foods' Bitcoin account number... They wouldn't have just one "ac

> Well, for a while Whole Foods was accepting payment by Bitcoin. That means if you know Whole Foods' Bitcoin account number... They wouldn't have just one "account number". Standard practice is to use a different address for each transaction, both for privacy and for increased security. (An attacker only has the public key hash to work from for any unspent transactions, not the full public key.) Now, these funds would probably be consolidated into a smaller number of holding accounts, and you might be able to deduce some other likely payments to Whole Foods by looking at which inputs were combined together in later transactions, but obtaining their complete ledger is nowhere near as simple as looking at one payment to Whole Foods and finding all the other transactions involving the same address.