Binary options are always looking for the next big thing to trade and cryptocurrencies are flavour of the month at present. All currencies will be looked after and their interest guarded by a central bank but with no central bank to control the rates offered on cryptocurrencies they can be traded without interference.
Back in the nineties there were attempts to create digital currencies which all failed, just look at Digicash! That was until Bitcoin came along which almost worked by accident. Bitcoin emerged out of an attempt to create a digital cash entity without any central point of control and it was created to have a peer to peer network.