the thread is a bit old and your a newbie when you ask this but now you are still a newbie ? i hope you already learned a lot if what is bitcoin and if what its difference versus other offline currencies but id still like to give my own answer here . obviously , bitcoin has a more market value as when compare to offline currencies but that is if we compare them today , but before when the first day bitcoin came out , its value is only cents or less than that so we can say that fiat has a more value . bitcoin is offline which makes him a unique currency , it has advantage and disadvantage so its up to you if you will accept it or continue using offline currencies .
Offline, but its not clear Bitcoin is centralized or decentralized, bitcoin was created by a tannic person and a completely different team is engaged in it.