Well, currencies have been "distributed" for most of history -- they're distributed into your pocket and you can't spend 'em twice because they're physical obje

Well, currencies have been "distributed" for most of history -- they're distributed into your pocket and you can't spend 'em twice because they're physical objects. An electronic currency without a central database is admittedly novel. Though didn't I hear there's a terrible scaling problem? That every single bitcoin user needs to have a database of every bitcoin transaction that has ever taken place?