Bitcoin is a layer of trust placed on top of the internet. The internet promised to decentralise everything but we quickly learnt that this was the quickest was to loose money of get scammed. So enter 3rd party intermediaries to act as an artificial layer of trust. These are the online banks, pay pals, ebays and amazons of the world. With bitcoin and decentralised crypto we have to opportunity to do peer to peer deals with people over the internet without a 3rd party overseeing all transactions and having the ability to close accounts at will